Marine Weather and Tide Forecast for Westerly, RI
 | Sunrise 6:22 AM Sunset 7:05 PM Moonrise 5:41 AM Moonset 6:47 PM |
Marine Forecasts
NOTE: Zones updated 4/16/2026. Some zones changed. Use Edit if needed.
ANZ237 Block Island Sound- 703 Pm Edt Thu Sep 10 2026
.small craft advisory in effect until 8 pm edt this evening - .
Tonight - W winds 10 to 15 kt with gusts up to 20 kt, becoming nw 5 to 10 kt after midnight. Seas 2 to 4 ft. Wave detail: W 3 ft at 7 seconds and se 2 ft at 9 seconds.
Fri - N winds 5 to 10 kt, becoming W in the afternoon. Seas 2 to 3 ft. Wave detail: sw 3 ft at 7 seconds and se 1 foot at 10 seconds.
Fri night - W winds 5 to 10 kt, becoming N after midnight. Seas around 2 ft. Wave detail: sw 2 ft at 6 seconds and se 1 foot at 10 seconds.
Sat - E winds around 5 kt, becoming se in the afternoon. Seas around 2 ft. Wave detail: S 2 ft at 7 seconds and se 1 foot at 10 seconds.
Sat night - S winds 5 to 10 kt. Seas around 2 ft. Wave detail: S 2 ft at 6 seconds and se 1 foot at 10 seconds. A chance of showers after midnight.
Sun - S winds around 10 kt. Seas 2 to 3 ft. Wave detail: S 3 ft at 6 seconds and se 1 foot at 10 seconds. Showers likely.
Sun night - SW winds 5 to 10 kt, becoming W after midnight. Seas 2 to 4 ft.
Mon through Tue night - S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft.
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 703 Pm Edt Thu Sep 10 2026
Synopsis for massachusetts and rhode island coastal waters - High pres then builds behind this front Fri into Sat. This high will shift east of the waters by Sun as a warm front crosses the region. A cold front quickly follows Sun night with high pres nosing in from the west by Mon.
7 Day Forecast for Marine Location Near Westerly, RI
NEW! Add second zone forecast
| Westerly Click for Map Thu -- 03:25 AM EDT 0.02 feet Low Tide Thu -- 05:40 AM EDT Moonrise Thu -- 06:22 AM EDT Sunrise Thu -- 08:47 AM EDT 3.20 feet High Tide Thu -- 03:45 PM EDT 0.16 feet Low Tide Thu -- 06:47 PM EDT Moonset Thu -- 07:05 PM EDT Sunset Thu -- 09:09 PM EDT 3.27 feet High Tide Thu -- 11:27 PM EDT New Moon Tide / Current data from XTide NOT FOR NAVIGATION |
Westerly, Pawcatuck River, Rhode Island (sub), Tide feet
| 12 am |
| 1.9 |
| 1 am |
| 1.2 |
| 2 am |
| 0.5 |
| 3 am |
| 0.1 |
| 4 am |
| 0.1 |
| 5 am |
| 0.8 |
| 6 am |
| 1.7 |
| 7 am |
| 2.5 |
| 8 am |
| 3.1 |
| 9 am |
| 3.2 |
| 10 am |
| 3 |
| 11 am |
| 2.5 |
| 12 pm |
| 2 |
| 1 pm |
| 1.5 |
| 2 pm |
| 0.8 |
| 3 pm |
| 0.3 |
| 4 pm |
| 0.2 |
| 5 pm |
| 0.6 |
| 6 pm |
| 1.5 |
| 7 pm |
| 2.3 |
| 8 pm |
| 3 |
| 9 pm |
| 3.3 |
| 10 pm |
| 3.2 |
| 11 pm |
| 2.8 |
| Little Narragansett Bay entrance Click for Map Flood direction 92 true Ebb direction 268 true Thu -- 03:45 AM EDT 0.01 knots Slack Thu -- 05:41 AM EDT Moonrise Thu -- 06:22 AM EDT Sunrise Thu -- 06:41 AM EDT 1.55 knots Max Flood Thu -- 09:25 AM EDT -0.00 knots Slack Thu -- 11:55 AM EDT -1.45 knots Max Ebb Thu -- 04:10 PM EDT 0.01 knots Slack Thu -- 06:47 PM EDT Moonset Thu -- 07:02 PM EDT 1.52 knots Max Flood Thu -- 07:05 PM EDT Sunset Thu -- 09:48 PM EDT -0.00 knots Slack Thu -- 11:27 PM EDT New Moon Tide / Current data from XTide NOT FOR NAVIGATION |
Little Narragansett Bay entrance, Fishers Island Sound, Connecticut Current, knots
| 12 am |
| -1.4 |
| 1 am |
| -1.2 |
| 2 am |
| -0.9 |
| 3 am |
| -0.4 |
| 4 am |
| 0.2 |
| 5 am |
| 1 |
| 6 am |
| 1.5 |
| 7 am |
| 1.5 |
| 8 am |
| 1.2 |
| 9 am |
| 0.4 |
| 10 am |
| -0.5 |
| 11 am |
| -1.2 |
| 12 pm |
| -1.5 |
| 1 pm |
| -1.3 |
| 2 pm |
| -1 |
| 3 pm |
| -0.6 |
| 4 pm |
| -0.1 |
| 5 pm |
| 0.7 |
| 6 pm |
| 1.3 |
| 7 pm |
| 1.5 |
| 8 pm |
| 1.3 |
| 9 pm |
| 0.7 |
| 10 pm |
| -0.2 |
| 11 pm |
| -1 |
FXUS61 KBOX 102336 AFDBOX
Area Forecast Discussion National Weather Service Boston/Norton MA 736 PM EDT Thu Sep 10 2026
WHAT HAS CHANGED
No significant changes to the forecast.
KEY MESSAGES
- Plenty of sunshine with comfortable humidity Fri-Sat. Highs mainly in the 70s. Lows Fri night in the 40s and 50s.
- Chances for showers return late Saturday night into Sunday.
Dry and seasonable weather returns Monday.
- A quick bought of summer like heat is possible towards the middle of next weak ahead of a cold front.
DISCUSSION
KEY MESSAGE 1...Plenty of sunshine with comfortable humidity Fri-Sat. Highs mainly in the 70s. Lows Fri night in the 40s and 50s.
Large high pressure arrives from the west Friday, then moves overhead for Saturday. This will mean mainly dry weather with relatively light winds. Expecting rather good radiational cooling conditions Friday night. Some of the colder locations could fall into the mid 40s, while the more urban centers should be 55-60.
KEY MESSAGE 2...Chances for showers return late Saturday night into Sunday. Dry and seasonable weather returns Monday.
As the high pressure system moves offshore Saturday, a shortwave pushes through southern New England likely bringing a wave of showers with it Saturday night into Sunday. Dewpoints surging to near 70 degrees and PWATs climbing to near 2" by Sunday morning indicate the possibility that some showers could have some heavier banding set up, especially south of the Mass Pike.
Initial model guidance is hinting at rainfall totals upwards of 0.75", but we're not quite within range of the CAMs yet.
Certainly something to keep an eye on.
Another ridge of high pressure should begin to move in sometime later Sunday evening or Monday bringing mainly dry and seasonable weather for the start of the next work week.
KEY MESSAGE 3...A quick bought of summer like heat is possible towards the middle of next weak ahead of a cold front.
Global guidance is suggesting an anomalously strong upper level ridge builds by the middle of next week over the southeastern states and Appalachian region. This would indicate southern New England returns to predominantly west-southwest flow, pushing warmer air from the south into New England. Depending on how much mixing we can generate at the surface ahead of the next cold front, there is potential for high temperatures to reach back into the 80s for a day or two by the middle of next week.
AVIATION /00Z FRIDAY THROUGH TUESDAY/
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
Tonight...High confidence.
VFR. Diminishing NW winds which should decouple in the normal low- lying locations.
Friday and Friday Night...High confidence.
VFR. NW winds 6-12 knots, becoming light NW to N Friday night.
KBOS Terminal...High confidence in TAF.
KBDL Terminal...High confidence in TAF.
Outlook /Saturday through Tuesday/...
Saturday: VFR.
Saturday Night: Mainly VFR, with local MVFR possible. Chance SHRA.
Sunday: Mainly VFR, with local IFR possible. Breezy. Chance SHRA, slight chance TSRA.
Sunday Night through Tuesday: VFR.
MARINE
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
Through Friday Night...High confidence.
Winds and seas are expected to gradually subside this evening, with rough seas lingering longer across the southern coastal and outer waters. Anticipating that Small Craft Advisories will be able to be dropped in stages this evening and overnight. High pressure moving over the waters should result in relatively light winds and seas Friday through Friday Night.
Outlook /Saturday through Tuesday/...
Saturday through Saturday Night: Winds less than 25 kt.
Sunday through Sunday Night: Winds less than 25 kt. Areas of seas approaching 5 ft. Chance of rain showers, slight chance of thunderstorms.
Monday through Tuesday: Winds less than 25 kt.
BOX WATCHES/WARNINGS/ADVISORIES
CT...None.
MA...None.
RI...None.
MARINE...Small Craft Advisory until 8 PM EDT this evening for ANZ230- 235-237.
Small Craft Advisory until 1 AM EDT Friday for ANZ254.
Small Craft Advisory until 4 AM EDT Friday for ANZ255-256.
Area Forecast Discussion National Weather Service Boston/Norton MA 736 PM EDT Thu Sep 10 2026
WHAT HAS CHANGED
No significant changes to the forecast.
KEY MESSAGES
- Plenty of sunshine with comfortable humidity Fri-Sat. Highs mainly in the 70s. Lows Fri night in the 40s and 50s.
- Chances for showers return late Saturday night into Sunday.
Dry and seasonable weather returns Monday.
- A quick bought of summer like heat is possible towards the middle of next weak ahead of a cold front.
DISCUSSION
KEY MESSAGE 1...Plenty of sunshine with comfortable humidity Fri-Sat. Highs mainly in the 70s. Lows Fri night in the 40s and 50s.
Large high pressure arrives from the west Friday, then moves overhead for Saturday. This will mean mainly dry weather with relatively light winds. Expecting rather good radiational cooling conditions Friday night. Some of the colder locations could fall into the mid 40s, while the more urban centers should be 55-60.
KEY MESSAGE 2...Chances for showers return late Saturday night into Sunday. Dry and seasonable weather returns Monday.
As the high pressure system moves offshore Saturday, a shortwave pushes through southern New England likely bringing a wave of showers with it Saturday night into Sunday. Dewpoints surging to near 70 degrees and PWATs climbing to near 2" by Sunday morning indicate the possibility that some showers could have some heavier banding set up, especially south of the Mass Pike.
Initial model guidance is hinting at rainfall totals upwards of 0.75", but we're not quite within range of the CAMs yet.
Certainly something to keep an eye on.
Another ridge of high pressure should begin to move in sometime later Sunday evening or Monday bringing mainly dry and seasonable weather for the start of the next work week.
KEY MESSAGE 3...A quick bought of summer like heat is possible towards the middle of next weak ahead of a cold front.
Global guidance is suggesting an anomalously strong upper level ridge builds by the middle of next week over the southeastern states and Appalachian region. This would indicate southern New England returns to predominantly west-southwest flow, pushing warmer air from the south into New England. Depending on how much mixing we can generate at the surface ahead of the next cold front, there is potential for high temperatures to reach back into the 80s for a day or two by the middle of next week.
AVIATION /00Z FRIDAY THROUGH TUESDAY/
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
Tonight...High confidence.
VFR. Diminishing NW winds which should decouple in the normal low- lying locations.
Friday and Friday Night...High confidence.
VFR. NW winds 6-12 knots, becoming light NW to N Friday night.
KBOS Terminal...High confidence in TAF.
KBDL Terminal...High confidence in TAF.
Outlook /Saturday through Tuesday/...
Saturday: VFR.
Saturday Night: Mainly VFR, with local MVFR possible. Chance SHRA.
Sunday: Mainly VFR, with local IFR possible. Breezy. Chance SHRA, slight chance TSRA.
Sunday Night through Tuesday: VFR.
MARINE
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
Through Friday Night...High confidence.
Winds and seas are expected to gradually subside this evening, with rough seas lingering longer across the southern coastal and outer waters. Anticipating that Small Craft Advisories will be able to be dropped in stages this evening and overnight. High pressure moving over the waters should result in relatively light winds and seas Friday through Friday Night.
Outlook /Saturday through Tuesday/...
Saturday through Saturday Night: Winds less than 25 kt.
Sunday through Sunday Night: Winds less than 25 kt. Areas of seas approaching 5 ft. Chance of rain showers, slight chance of thunderstorms.
Monday through Tuesday: Winds less than 25 kt.
BOX WATCHES/WARNINGS/ADVISORIES
CT...None.
MA...None.
RI...None.
MARINE...Small Craft Advisory until 8 PM EDT this evening for ANZ230- 235-237.
Small Craft Advisory until 1 AM EDT Friday for ANZ254.
Small Craft Advisory until 4 AM EDT Friday for ANZ255-256.
| Stations | Dist | Age | Wind | Air | Water | Waves | inHg | DewPt |
| NLHC3 | 14 mi | 51 min | 76°F | 70°F | 29.81 | |||
| MTKN6 - 8510560 - Montauk, NY | 24 mi | 51 min | 75°F | 73°F | 29.84 | |||
| PDVR1 | 27 mi | 51 min | SW 1G | 75°F | 29.80 | 69°F | ||
| NWPR1 - 8452660 - Newport, RI | 28 mi | 51 min | WSW 8G | 76°F | 71°F | 29.81 | ||
| NAXR1 - Narragansett Bay Reserve, RI | 32 mi | 51 min | E 4.1 | 75°F | 29.80 | 69°F | ||
| PRUR1 | 32 mi | 51 min | 75°F | 70°F | ||||
| PTCR1 - 8452951 - Potter Cove, Prudence Island, RI | 32 mi | 51 min | W 2.9G | 76°F | 29.80 | |||
| CPTR1 - 8452944 - Conimicut Light, RI | 35 mi | 51 min | W 7G | 77°F | 73°F | 29.81 | ||
| FOXR1 - 8454000 - Providence, RI | 37 mi | 51 min | WNW 8G | 80°F | 69°F | 29.74 | ||
| PVDR1 | 37 mi | 51 min | WNW 6G | 79°F | 29.81 | |||
| BLTM3 - 8447387 - Borden Flats Light at Fall River, MA | 41 mi | 51 min | SW 11G | 76°F | 29.81 | |||
| FRXM3 | 41 mi | 51 min | 77°F | 70°F | ||||
| 44085 | 42 mi | 111 min | 71°F | 68°F | 5 ft | |||
| BUZM3 - Buzzards Bay, MA | 42 mi | 51 min | WSW 17G | 29.81 | ||||
| FRVM3 - 8447386 - Fall River, MA | 42 mi | 51 min | 78°F | 73°F | 29.82 | |||
| 44097 - Block Island, RI (154) | 47 mi | 51 min | 73°F | 72°F | 6 ft |
Wind History for Quonset Point, RI
toggle option: (graph/table)
No data
| Airport | Dist | Age | Wind kt | Vis | Sky | Weather | Air | DewPt | RH | inHg |
| KWST Westerly State Airport US | 3 sm | 57 min | calm | 10 sm | Clear | 75°F | 66°F | 74% | 29.81 | |
| KGON Groton New London Airport US | 12 sm | 54 min | W 04 | 10 sm | Clear | 75°F | 66°F | 74% | 29.80 | |
| KBID Block Island State Airport US | 20 sm | 54 min | SW 12 | 10 sm | Clear | 72°F | 66°F | 83% | 29.82 | |
| KMTP Montauk Airport US | 22 sm | 56 min | var 03 | -- | 75°F | 68°F | 78% | 29.83 |
Link to 5 hour of 5 minute data for KWST
Terminal Aerodrome Forecast (TAF) for KWST
Wind History Graph: WST
(wind in knots)
GEOS Local Image of north east
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