Marine Weather and Tide Forecast for West Chatham, MA
 | Sunrise 7:03 AM Sunset 6:39 PM Moonrise 12:00 AM Moonset 9:03 AM |
Marine Forecasts
NOTE: Zones were updated 3/20/2025. If your report is out of date, please click Edit
ANZ254 Coastal Waters From Provincetown Ma To Chatham Ma To Nantucket Ma Out 20 Nm- 704 Pm Edt Sun Mar 8 2026
.small craft advisory in effect through Monday morning - .
Tonight - W winds 10 to 15 kt with gusts up to 20 kt, becoming sw 5 to 10 kt after midnight. Seas 4 to 6 ft. Wave detail: sw 5 ft at 8 seconds and E 3 ft at 10 seconds. Patchy fog. Vsby 1 nm or less.
Mon - SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 3 to 5 ft. Wave detail: sw 3 ft at 7 seconds and E 3 ft at 9 seconds. Patchy fog. Vsby 1 nm or less.
Mon night - SW winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 4 ft. Wave detail: S 3 ft at 7 seconds and E 2 ft at 9 seconds. Patchy fog. Vsby 1 nm or less.
Tue - SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave detail: sw 2 ft at 7 seconds and E 2 ft at 9 seconds. Patchy fog in the morning with vsby 1 nm or less.
Tue night and Wed - S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave detail: S 3 ft at 5 seconds and se 2 ft at 8 seconds.
Wed night - S winds 20 to 25 kt with gusts up to 30 kt. Seas 5 to 7 ft. Wave detail: S 7 ft at 7 seconds and E 2 ft at 9 seconds.
Thu - SW winds 20 to 25 kt with gusts up to 30 kt. Seas 6 to 9 ft. A chance of rain.
Thu night - W winds 25 to 30 kt. Seas 5 to 8 ft. A chance of rain and snow.
Fri - W winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to 6 ft.
Fri night - SW winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to 6 ft. A chance of rain.
seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height.
seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height.
ANZ200 704 Pm Edt Sun Mar 8 2026
Synopsis for massachusetts and rhode island coastal waters - High pres then arrives early next week. The next frontal system moves through late next week bringing mainly rain and enhanced southerly winds and gusts.
7 Day Forecast for Marine Location Near West Chatham, MA
NEW! Add second zone forecast
| Pleasant Bay Click for Map Sun -- 05:34 AM EDT 3.29 feet High Tide Sun -- 07:03 AM EDT Sunrise Sun -- 09:03 AM EDT Moonset Sun -- 12:51 PM EDT 0.13 feet Low Tide Sun -- 06:04 PM EDT 2.99 feet High Tide Sun -- 06:38 PM EDT Sunset Tide / Current data from XTide NOT FOR NAVIGATION |
Pleasant Bay, Cape Cod, Massachusetts, Tide feet
| 12 am |
| 0.4 |
| 1 am |
| 0.9 |
| 3 am |
| 1.7 |
| 4 am |
| 2.6 |
| 5 am |
| 3.2 |
| 6 am |
| 3.3 |
| 7 am |
| 3 |
| 8 am |
| 2.5 |
| 9 am |
| 1.9 |
| 10 am |
| 1.3 |
| 11 am |
| 0.7 |
| 12 pm |
| 0.3 |
| 1 pm |
| 0.1 |
| 2 pm |
| 0.5 |
| 3 pm |
| 1.2 |
| 4 pm |
| 1.9 |
| 5 pm |
| 2.7 |
| 6 pm |
| 3 |
| 7 pm |
| 2.9 |
| 8 pm |
| 2.6 |
| 9 pm |
| 2.1 |
| 10 pm |
| 1.6 |
| 11 pm |
| 1 |
| Pollock Rip Channel Click for Map Flood direction 53 true Ebb direction 212 true Sun -- 12:07 AM EST -0.00 knots Slack Sun -- 03:34 AM EDT -1.85 knots Max Ebb Sun -- 07:03 AM EDT Sunrise Sun -- 07:06 AM EDT 0.00 knots Slack Sun -- 09:03 AM EDT Moonset Sun -- 10:07 AM EDT 1.91 knots Max Flood Sun -- 01:34 PM EDT -0.00 knots Slack Sun -- 03:58 PM EDT -1.73 knots Max Ebb Sun -- 06:38 PM EDT Sunset Sun -- 07:30 PM EDT 0.00 knots Slack Sun -- 10:27 PM EDT 1.74 knots Max Flood Tide / Current data from XTide NOT FOR NAVIGATION |
Pollock Rip Channel, east end, Nantucket Sound entrance, Massachusetts Current, knots
| 12 am |
| 0.1 |
| 1 am |
| -1.1 |
| 3 am |
| -1.8 |
| 4 am |
| -1.8 |
| 5 am |
| -1.5 |
| 6 am |
| -0.9 |
| 7 am |
| -0.1 |
| 8 am |
| 0.9 |
| 9 am |
| 1.6 |
| 10 am |
| 1.9 |
| 11 am |
| 1.8 |
| 12 pm |
| 1.3 |
| 1 pm |
| 0.5 |
| 2 pm |
| -0.5 |
| 3 pm |
| -1.4 |
| 4 pm |
| -1.7 |
| 5 pm |
| -1.6 |
| 6 pm |
| -1.1 |
| 7 pm |
| -0.4 |
| 8 pm |
| 0.5 |
| 9 pm |
| 1.3 |
| 10 pm |
| 1.7 |
| 11 pm |
| 1.7 |
FXUS61 KBOX 081858 AFDBOX
Area Forecast Discussion National Weather Service Boston/Norton MA 258 PM EDT Sun Mar 8 2026
WHAT HAS CHANGED
No significant changes to the forecast. We now have high confidence in springtime warmth for much of this week, especially Tuesday, along with the potential for minor river flooding within the next 7 days.
KEY MESSAGES
- Any lingering scattered showers depart by this evening.
- Above normal temperatures next week. Trending more unsettled mid to late week with a round or two of precipitation. Back to cool temperatures by Friday.
- Expecting significant snowmelt over the coming week. Minor river flooding possible.
DISCUSSION
KEY MESSAGE 1...Any lingering scattered showers depart by this evening.
A slow-moving front should finally push offshore this evening.
Expecting gradual clearing for most of southern New England as drier air arrives from the NW. However, clouds and areas of fog are likely to linger towards the south coast, including the Cape and islands, pretty much all night. Above normal low temperatures anticipated tonight.
We continue this warming trend right into Monday night with drier weather.
KEY MESSAGE 2...Above normal temperatures next week. Trending more unsettled mid to late week with a round or two of precipitation. Back to cool temperatures by Friday.
A mid-level ridge builds in further from the south advecting in warm, southerly flow. In response, 925mb temperatures rise to 10-14C, supporting above normal temperatures for much of next week. Tuesday will likely be the warmest day with highs in the 60s with a interior/valley areas potentially approaching 70.
This runs temperatures round 20-25 degrees above normal.
However, immediate coastal areas end up on the cooler side, especially along the immediate south coast and the Cape and Islands given the onshore southerly component flow. Those mentioned areas will more likely stay in the 40s and 50s. Some guidance continues to hint at the potential for a backdoor front sinking into the northern portions of MA, mainly northeast MA.
If this front shifts far enough southward, temperatures would end up cooler in northeast MA relative to other areas of southern New England. Confidence still on the lower end with this given the lack of model agreement and there is some question on the south extent of the front/cooler air.
The pattern trends more unsettled Wednesday onward with the passage of a few shortwave troughs bringing a few rounds of precipitation through late week. A plume of above normal moisture will advect in out ahead of a more robust shortwave moving across the Great Lakes starting Wednesday. A weaker leading wave will help generate scattered showers on Wednesday.
Thursday's wave will be more organized with a stronger cold front/trough accompanying it. This will support more widespread precipitation Thursday. Likely rain to start, with a transition to snow/wintry mix possible for the higher terrain as the front works through later Thursday.
Trending cooler for Friday behind the cold front. Confidence in the pattern decreases into the weekend with potential for a few systems to move through the flow bringing periodic chances for precipitation Saturday through early the following week.
KEY MESSAGE 3...Expecting significant snowmelt over the coming week. Minor river flooding possible.
Elevated temperatures and dewpoints this week will lead to rapid melting of what's left of our snowpack, which eventually leads to rises on rivers and streams. Guidance continues to indicate a likelihood of reaching minor flood stage in the CT river valley late next week, and can't rule out several other rivers as well.
AVIATION /18Z SUNDAY THROUGH FRIDAY/
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
Today...High confidence in trends with moderate confidence in timing.
Widespread IFR conditions continue to improve this afternoon, with areas northwest of I-95 already VFR as drier air arrives.
Meanwhile...IFR/LIFR conditions will persist near the south coast and especially the Cape & Islands where fog and areas of drizzle may linger into the afternoon. Generally WSW winds 5-10 knots with a few gusts up to 20 knots.
Tonight and Monday...High confidence.
Any lingering IFR/LIFR conditions near the Cape/Islands this evening should scour out toward or shortly after after midnight.
Otherwise...mainly VFR tonight and Monday. Calm/light SW winds tonight. Winds on Mon will be from the S-SW at 7 to 15 knots.
Monday Night...High confidence.
Mainly VFR. Risk for IFR in stratus and fog towards the Cape and islands late.
KBOS Terminal...High confidence in trends and moderate confidence in timing.
KBDL Terminal...High confidence in trends and moderate confidence in timing.
Outlook /Tuesday through Friday/...
Tuesday through Tuesday Night: VFR.
Wednesday: Mainly VFR, with local IFR possible. Breezy. Slight chance RA.
Wednesday Night: Windy with local gusts up to 30 kt. Chance RA.
Thursday: Windy with gusts up to 30 kt. Chance RA, chance SN.
Thursday Night: Windy with local gusts up to 30 kt. Chance RA, slight chance SN.
Friday: Breezy. Slight chance RA, slight chance SN.
MARINE
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
Today through Monday...High confidence.
Lingering rough seas across the coastal waters will be slower to diminish, but should finally drop below Small Craft Advisory levels by mid morning Monday. Lastly, areas of fog reducing visibility to less than 1 NM will remain a concern for mariners until a cold front finally moves off to the east this evening.
Outlook /Tuesday through Friday/...
Tuesday through Tuesday Night: Winds less than 25 kt.
Wednesday: Winds less than 25 kt. Seas locally approaching 5 ft. Slight chance of rain.
Wednesday Night: Strong winds with gusts up to 30 kt. Areas of rough seas. Chance of rain, slight chance of thunderstorms.
Thursday: Strong winds with gusts up to 30 kt. Rough seas up to 10 ft. Chance of rain.
Thursday Night: Strong winds with gusts up to 35 kt. Rough seas up to 9 ft. Chance of rain, slight chance of snow.
Friday: Low risk for Small Craft Advisory winds with gusts up to 30 kt. Seas up to 5 ft.
BOX WATCHES/WARNINGS/ADVISORIES
CT...None.
MA...None.
RI...None.
MARINE...Small Craft Advisory until 7 PM EDT this evening for ANZ232- 233.
Small Craft Advisory until 1 AM EDT Monday for ANZ235-237.
Small Craft Advisory until 10 PM EDT this evening for ANZ250.
Small Craft Advisory until 10 AM EDT Monday for ANZ254>256.
Area Forecast Discussion National Weather Service Boston/Norton MA 258 PM EDT Sun Mar 8 2026
WHAT HAS CHANGED
No significant changes to the forecast. We now have high confidence in springtime warmth for much of this week, especially Tuesday, along with the potential for minor river flooding within the next 7 days.
KEY MESSAGES
- Any lingering scattered showers depart by this evening.
- Above normal temperatures next week. Trending more unsettled mid to late week with a round or two of precipitation. Back to cool temperatures by Friday.
- Expecting significant snowmelt over the coming week. Minor river flooding possible.
DISCUSSION
KEY MESSAGE 1...Any lingering scattered showers depart by this evening.
A slow-moving front should finally push offshore this evening.
Expecting gradual clearing for most of southern New England as drier air arrives from the NW. However, clouds and areas of fog are likely to linger towards the south coast, including the Cape and islands, pretty much all night. Above normal low temperatures anticipated tonight.
We continue this warming trend right into Monday night with drier weather.
KEY MESSAGE 2...Above normal temperatures next week. Trending more unsettled mid to late week with a round or two of precipitation. Back to cool temperatures by Friday.
A mid-level ridge builds in further from the south advecting in warm, southerly flow. In response, 925mb temperatures rise to 10-14C, supporting above normal temperatures for much of next week. Tuesday will likely be the warmest day with highs in the 60s with a interior/valley areas potentially approaching 70.
This runs temperatures round 20-25 degrees above normal.
However, immediate coastal areas end up on the cooler side, especially along the immediate south coast and the Cape and Islands given the onshore southerly component flow. Those mentioned areas will more likely stay in the 40s and 50s. Some guidance continues to hint at the potential for a backdoor front sinking into the northern portions of MA, mainly northeast MA.
If this front shifts far enough southward, temperatures would end up cooler in northeast MA relative to other areas of southern New England. Confidence still on the lower end with this given the lack of model agreement and there is some question on the south extent of the front/cooler air.
The pattern trends more unsettled Wednesday onward with the passage of a few shortwave troughs bringing a few rounds of precipitation through late week. A plume of above normal moisture will advect in out ahead of a more robust shortwave moving across the Great Lakes starting Wednesday. A weaker leading wave will help generate scattered showers on Wednesday.
Thursday's wave will be more organized with a stronger cold front/trough accompanying it. This will support more widespread precipitation Thursday. Likely rain to start, with a transition to snow/wintry mix possible for the higher terrain as the front works through later Thursday.
Trending cooler for Friday behind the cold front. Confidence in the pattern decreases into the weekend with potential for a few systems to move through the flow bringing periodic chances for precipitation Saturday through early the following week.
KEY MESSAGE 3...Expecting significant snowmelt over the coming week. Minor river flooding possible.
Elevated temperatures and dewpoints this week will lead to rapid melting of what's left of our snowpack, which eventually leads to rises on rivers and streams. Guidance continues to indicate a likelihood of reaching minor flood stage in the CT river valley late next week, and can't rule out several other rivers as well.
AVIATION /18Z SUNDAY THROUGH FRIDAY/
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
Today...High confidence in trends with moderate confidence in timing.
Widespread IFR conditions continue to improve this afternoon, with areas northwest of I-95 already VFR as drier air arrives.
Meanwhile...IFR/LIFR conditions will persist near the south coast and especially the Cape & Islands where fog and areas of drizzle may linger into the afternoon. Generally WSW winds 5-10 knots with a few gusts up to 20 knots.
Tonight and Monday...High confidence.
Any lingering IFR/LIFR conditions near the Cape/Islands this evening should scour out toward or shortly after after midnight.
Otherwise...mainly VFR tonight and Monday. Calm/light SW winds tonight. Winds on Mon will be from the S-SW at 7 to 15 knots.
Monday Night...High confidence.
Mainly VFR. Risk for IFR in stratus and fog towards the Cape and islands late.
KBOS Terminal...High confidence in trends and moderate confidence in timing.
KBDL Terminal...High confidence in trends and moderate confidence in timing.
Outlook /Tuesday through Friday/...
Tuesday through Tuesday Night: VFR.
Wednesday: Mainly VFR, with local IFR possible. Breezy. Slight chance RA.
Wednesday Night: Windy with local gusts up to 30 kt. Chance RA.
Thursday: Windy with gusts up to 30 kt. Chance RA, chance SN.
Thursday Night: Windy with local gusts up to 30 kt. Chance RA, slight chance SN.
Friday: Breezy. Slight chance RA, slight chance SN.
MARINE
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
Today through Monday...High confidence.
Lingering rough seas across the coastal waters will be slower to diminish, but should finally drop below Small Craft Advisory levels by mid morning Monday. Lastly, areas of fog reducing visibility to less than 1 NM will remain a concern for mariners until a cold front finally moves off to the east this evening.
Outlook /Tuesday through Friday/...
Tuesday through Tuesday Night: Winds less than 25 kt.
Wednesday: Winds less than 25 kt. Seas locally approaching 5 ft. Slight chance of rain.
Wednesday Night: Strong winds with gusts up to 30 kt. Areas of rough seas. Chance of rain, slight chance of thunderstorms.
Thursday: Strong winds with gusts up to 30 kt. Rough seas up to 10 ft. Chance of rain.
Thursday Night: Strong winds with gusts up to 35 kt. Rough seas up to 9 ft. Chance of rain, slight chance of snow.
Friday: Low risk for Small Craft Advisory winds with gusts up to 30 kt. Seas up to 5 ft.
BOX WATCHES/WARNINGS/ADVISORIES
CT...None.
MA...None.
RI...None.
MARINE...Small Craft Advisory until 7 PM EDT this evening for ANZ232- 233.
Small Craft Advisory until 1 AM EDT Monday for ANZ235-237.
Small Craft Advisory until 10 PM EDT this evening for ANZ250.
Small Craft Advisory until 10 AM EDT Monday for ANZ254>256.
| Stations | Dist | Age | Wind | Air | Water | Waves | inHg | DewPt |
| CHTM3 | 3 mi | 47 min | 41°F | 29.81 | ||||
| 44090 | 20 mi | 47 min | 40°F | 35°F | ||||
| 44020 - NANTUCKET SOUND | 23 mi | 37 min | WSW 7.8G | 40°F | 37°F | 29.80 | ||
| NTKM3 - 8449130 - Nantucket Island, MA | 31 mi | 47 min | WSW 8G | 44°F | 40°F | 29.83 | ||
| WAXM3 - Waquoit Bay Reserve, MA | 31 mi | 92 min | SSE 1 | 41°F | 29.77 | 41°F | ||
| BZBM3 - 8447930 - Woods Hole, MA | 40 mi | 47 min | 39°F | 35°F | 29.82 |
Wind History for Nantucket Island, MA
toggle option: (graph/table)
Link to 1 hour of 5 minute data for KCQX
Terminal Aerodrome Forecast (TAF) for KCQX
Wind History Graph: CQX
(wind in knots)
GEOS Local Image of Northeast
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