Marine Weather and Tide Forecast for South Bethany, DE
 | Sunrise 7:20 AM Sunset 6:12 PM Moonrise 4:05 PM Moonset 4:30 AM |
Marine Forecasts
NOTE: Zones updated 4/16/2026. Some zones changed. Use Edit if needed.
ANZ455 Coastal Waters From Cape Henlopen To Fenwick Island De Out 20 Nm- 500 Pm Edt Sat Oct 24 2026
Tonight - NE winds 5 to 10 kt. Seas 3 to 4 ft. Wave detail: E 4 ft at 9 seconds.
Sun - NE winds 5 to 10 kt. Seas 3 to 4 ft. Wave detail: E 4 ft at 10 seconds.
Sun night - N winds around 5 kt. Seas 2 to 3 ft. Wave detail: E 3 ft at 11 seconds.
Mon - NW winds 5 to 10 kt. Seas 2 to 3 ft. Wave detail: E 3 ft at 10 seconds.
Mon night - NW winds 5 to 10 kt. Seas 2 to 3 ft. Wave detail: se 3 ft at 11 seconds.
Tue - NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Wave detail: N 3 ft at 3 seconds and se 3 ft at 11 seconds.
Tue night - NE winds 10 to 15 kt. Seas 4 to 5 ft.
Wed - NE winds 10 to 15 kt. Seas around 4 ft.
Wed night - E winds 5 to 10 kt. Seas 3 to 4 ft.
Thu - E winds 5 to 10 kt. Seas 3 to 4 ft.
Thu night - SE winds around 5 kt, becoming W after midnight. Seas 3 to 4 ft.
ANZ400 500 Pm Edt Sat Oct 24 2026
Synopsis for the coastal waters from sandy hook nj to fenwick island de and for delaware bay - A strong area of high pressure will remain in place through the weekend before shifting offshore on Monday. It will be followed by a weak cold front which will settle south across the area Monday night into Tuesday. Another area of high pressure then builds in for the middle to end of the week.
7 Day Forecast for Marine Location Near South Bethany, DE
NEW! Add second zone forecast
| Little Assawoman Bay Click for Map Note: See station comments in 'about' for disclaimers. Sat -- 04:11 AM EDT 0.42 feet Low Tide Sat -- 05:30 AM EDT Moonset Sat -- 07:18 AM EDT Sunrise Sat -- 10:19 AM EDT 1.13 feet High Tide Sat -- 04:44 PM EDT 0.42 feet Low Tide Sat -- 05:05 PM EDT Moonrise Sat -- 06:09 PM EDT Sunset Sat -- 10:35 PM EDT 1.07 feet High Tide Tide / Current data from XTide NOT FOR NAVIGATION |
Little Assawoman Bay, Delaware, Tide feet
| 12 am |
| 0.9 |
| 1 am |
| 0.8 |
| 2 am |
| 0.6 |
| 3 am |
| 0.5 |
| 4 am |
| 0.4 |
| 5 am |
| 0.5 |
| 6 am |
| 0.6 |
| 7 am |
| 0.8 |
| 8 am |
| 0.9 |
| 9 am |
| 1 |
| 10 am |
| 1.1 |
| 11 am |
| 1.1 |
| 12 pm |
| 1 |
| 1 pm |
| 0.9 |
| 2 pm |
| 0.7 |
| 3 pm |
| 0.6 |
| 4 pm |
| 0.4 |
| 5 pm |
| 0.4 |
| 6 pm |
| 0.5 |
| 7 pm |
| 0.7 |
| 8 pm |
| 0.8 |
| 9 pm |
| 1 |
| 10 pm |
| 1 |
| 11 pm |
| 1.1 |
| Delaware Bay entrance channel (depth 5 ft) Click for Map Flood direction 318 true Ebb direction 158 true Sat -- 12:04 AM EDT -2.82 knots Max Ebb Sat -- 03:59 AM EDT 0.00 knots Slack Sat -- 05:31 AM EDT Moonset Sat -- 06:15 AM EDT 1.42 knots Max Flood Sat -- 07:18 AM EDT Sunrise Sat -- 08:45 AM EDT -0.00 knots Slack Sat -- 12:30 PM EDT -2.90 knots Max Ebb Sat -- 04:28 PM EDT 0.00 knots Slack Sat -- 05:05 PM EDT Moonrise Sat -- 06:09 PM EDT Sunset Sat -- 06:36 PM EDT 1.34 knots Max Flood Sat -- 08:58 PM EDT -0.00 knots Slack Tide / Current data from XTide NOT FOR NAVIGATION |
Delaware Bay entrance channel (depth 5 ft), Delaware Current, knots
| 12 am |
| -2.8 |
| 1 am |
| -2.6 |
| 2 am |
| -1.9 |
| 3 am |
| -1 |
| 4 am |
| 0 |
| 5 am |
| 0.9 |
| 6 am |
| 1.4 |
| 7 am |
| 1.2 |
| 8 am |
| 0.6 |
| 9 am |
| -0.2 |
| 10 am |
| -1.1 |
| 11 am |
| -2.1 |
| 12 pm |
| -2.8 |
| 1 pm |
| -2.8 |
| 2 pm |
| -2.3 |
| 3 pm |
| -1.5 |
| 4 pm |
| -0.5 |
| 5 pm |
| 0.5 |
| 6 pm |
| 1.2 |
| 7 pm |
| 1.3 |
| 8 pm |
| 0.8 |
| 9 pm |
| -0 |
| 10 pm |
| -0.9 |
| 11 pm |
| -1.9 |
Area Discussion for Philadelphia/Mount Holly, PA
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FXUS61 KPHI 241842 AFDPHI
Area Forecast Discussion National Weather Service Mount Holly NJ 242 PM EDT Sat Oct 24 2026
WHAT HAS CHANGED
Issued Frost Advisories across portions of eastern PA, NJ, and the Delmarva where the growing season remains active.
Cancelled the last of the Small Craft Advisories on the Atlantic coastal waters.
KEY MESSAGES
1. Elevated tide cycles persist resulting in widespread minor coastal flooding continuing for back bay areas in Ocean County, NJ and Sussex County, DE.
2. A couple more rounds of frost impacts are expected both tonight and Sunday night where the growing season continues.
DISCUSSION
KEY MESSAGE 1...Elevated tide cycles persist resulting in widespread minor coastal flooding continuing for back bay areas in Ocean County, NJ and Sussex County, DE.
The remnants of Josephine have pulled away from the region as it's now over the Canadian Maritimes. However, elevated water levels persist, mainly in the back bay areas of Ocean County, NJ and Sussex County, Delaware. The Coastal Flood Advisory for these counties remains in effect until 6 PM today.
KEY MESSAGE 2...A couple more rounds of frost impacts are expected both tonight and Sunday night where the growing season continues.
Little change in the overall synoptic pattern is expected through tonight with strong surface high pressure essentially overhead. In fact, 500 mb temperatures are a touch cooler tonight but surface dew points are expected to be a couple of degrees higher tonight. Overall, this should result in low temperatures pretty similar to those observed earlier this morning with lows mainly in the 30s across the region, outside of coastal areas and southern DE. For this reason, have issued Frost Advisories for the entire region where the growing season remains active except for the coastal strip of NJ, Sussex County DE, and Talbot County, MD. Would not be surprised to see some areas dip into the upper 20s where the growing season remains active, more notably across the Pine Barrens of South Jersey, however, do not believe that enough coverage of sub- freezing temperatures will be met to prompt Freeze Warnings tonight in these areas.
Temperatures will then begin to moderate on Sunday before another round of frost is possible for Sunday night into Monday morning. Lows around the region will mainly be in the mid 30s to low 40s. Depending on how tonight's frost advisories pan out will determine where frost advisories may be warranted on Sunday night...more details to come in future updates.
AVIATION /18Z SATURDAY THROUGH THURSDAY/
The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG, KILG, KMIV, KACY and surrounding areas.
Rest of Today...VFR/SKC. Light and variable winds, may settle out of the south in the afternoon but remain generally less than 5 kt. High confidence.
Tonight...VFR/SKC. Winds light and variable becoming calm at times. High confidence.
Sunday...VFR/SKC. Winds light and variable in the morning, settling out of the southwest around 3-5 kt in the afternoon.
High confidence.
Outlook...
Sunday night through Thursday...VFR. No significant weather expected.
MARINE
The Small Craft Advisories from Little Egg Inlet to Fenwick Island have been cancelled as of 2 PM. There are no longer any marine headlines in effect.
Northeast winds will generally remain around 5-10 kt today with isolated gusts up to 15 kt possible. Winds will diminish this evening and settle out of the north around 5-10 kt. Winds on Sunday will then become northeasterly around 5-10 kt. Seas around 2-4 feet through Sunday. Fair weather.
Outlook...
Sunday night through Monday night... Fair weather. No marine headlines expected.
Tuesday through Tuesday night...SCA conditions possible.
Northeast winds may occasionally gust up to 20-25 kt with seas building to around 5 feet.
Wednesday through Thursday...Fair weather. No marine headlines expected.
PHI WATCHES/WARNINGS/ADVISORIES
PA...Frost Advisory from midnight tonight to 9 AM EDT Sunday for PAZ070-071-102-104-106.
NJ...Frost Advisory from midnight tonight to 9 AM EDT Sunday for NJZ012>023-027.
Coastal Flood Advisory until 6 PM EDT this evening for NJZ020- 026.
DE...Frost Advisory from midnight tonight to 9 AM EDT Sunday for DEZ001-002.
Coastal Flood Advisory until 6 PM EDT this evening for DEZ003- 004.
MD...Frost Advisory from midnight tonight to 9 AM EDT Sunday for MDZ012-015-020.
MARINE...None.
Area Forecast Discussion National Weather Service Mount Holly NJ 242 PM EDT Sat Oct 24 2026
WHAT HAS CHANGED
Issued Frost Advisories across portions of eastern PA, NJ, and the Delmarva where the growing season remains active.
Cancelled the last of the Small Craft Advisories on the Atlantic coastal waters.
KEY MESSAGES
1. Elevated tide cycles persist resulting in widespread minor coastal flooding continuing for back bay areas in Ocean County, NJ and Sussex County, DE.
2. A couple more rounds of frost impacts are expected both tonight and Sunday night where the growing season continues.
DISCUSSION
KEY MESSAGE 1...Elevated tide cycles persist resulting in widespread minor coastal flooding continuing for back bay areas in Ocean County, NJ and Sussex County, DE.
The remnants of Josephine have pulled away from the region as it's now over the Canadian Maritimes. However, elevated water levels persist, mainly in the back bay areas of Ocean County, NJ and Sussex County, Delaware. The Coastal Flood Advisory for these counties remains in effect until 6 PM today.
KEY MESSAGE 2...A couple more rounds of frost impacts are expected both tonight and Sunday night where the growing season continues.
Little change in the overall synoptic pattern is expected through tonight with strong surface high pressure essentially overhead. In fact, 500 mb temperatures are a touch cooler tonight but surface dew points are expected to be a couple of degrees higher tonight. Overall, this should result in low temperatures pretty similar to those observed earlier this morning with lows mainly in the 30s across the region, outside of coastal areas and southern DE. For this reason, have issued Frost Advisories for the entire region where the growing season remains active except for the coastal strip of NJ, Sussex County DE, and Talbot County, MD. Would not be surprised to see some areas dip into the upper 20s where the growing season remains active, more notably across the Pine Barrens of South Jersey, however, do not believe that enough coverage of sub- freezing temperatures will be met to prompt Freeze Warnings tonight in these areas.
Temperatures will then begin to moderate on Sunday before another round of frost is possible for Sunday night into Monday morning. Lows around the region will mainly be in the mid 30s to low 40s. Depending on how tonight's frost advisories pan out will determine where frost advisories may be warranted on Sunday night...more details to come in future updates.
AVIATION /18Z SATURDAY THROUGH THURSDAY/
The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG, KILG, KMIV, KACY and surrounding areas.
Rest of Today...VFR/SKC. Light and variable winds, may settle out of the south in the afternoon but remain generally less than 5 kt. High confidence.
Tonight...VFR/SKC. Winds light and variable becoming calm at times. High confidence.
Sunday...VFR/SKC. Winds light and variable in the morning, settling out of the southwest around 3-5 kt in the afternoon.
High confidence.
Outlook...
Sunday night through Thursday...VFR. No significant weather expected.
MARINE
The Small Craft Advisories from Little Egg Inlet to Fenwick Island have been cancelled as of 2 PM. There are no longer any marine headlines in effect.
Northeast winds will generally remain around 5-10 kt today with isolated gusts up to 15 kt possible. Winds will diminish this evening and settle out of the north around 5-10 kt. Winds on Sunday will then become northeasterly around 5-10 kt. Seas around 2-4 feet through Sunday. Fair weather.
Outlook...
Sunday night through Monday night... Fair weather. No marine headlines expected.
Tuesday through Tuesday night...SCA conditions possible.
Northeast winds may occasionally gust up to 20-25 kt with seas building to around 5 feet.
Wednesday through Thursday...Fair weather. No marine headlines expected.
PHI WATCHES/WARNINGS/ADVISORIES
PA...Frost Advisory from midnight tonight to 9 AM EDT Sunday for PAZ070-071-102-104-106.
NJ...Frost Advisory from midnight tonight to 9 AM EDT Sunday for NJZ012>023-027.
Coastal Flood Advisory until 6 PM EDT this evening for NJZ020- 026.
DE...Frost Advisory from midnight tonight to 9 AM EDT Sunday for DEZ001-002.
Coastal Flood Advisory until 6 PM EDT this evening for DEZ003- 004.
MD...Frost Advisory from midnight tonight to 9 AM EDT Sunday for MDZ012-015-020.
MARINE...None.
| Stations | Dist | Age | Wind | Air | Water | Waves | inHg | DewPt |
| 44084 | 2 mi | 167 min | 61°F | 4 ft | ||||
| OCIM2 - 8570283 - Ocean City Inlet, MD | 15 mi | 73 min | ENE 8G | 60°F | 60°F | 30.52 | ||
| 44009 - DELAWARE BAY 26 NM Southeast of Cape May, NJ | 17 mi | 63 min | NE 16G | 30.52 | ||||
| LWSD1 - 8557380 - Lewes, DE | 19 mi | 73 min | E 7G | 60°F | 60°F | 30.53 | ||
| CMAN4 - 8536110 - Cape May, NJ | 30 mi | 73 min | 0G | 63°F | 60°F | 30.52 | ||
| BRND1 - 8555889 - Brandywine Shoal Light, DE | 32 mi | 73 min | N 6G | 59°F | 30.52 | |||
| DRSD1 - Delaware Reserve, DE | 45 mi | 103 min | NE 2.9 | 62°F | 30.51 | 41°F |
Wind History for Ocean City Inlet, MD
toggle option: (graph/table)
Link to 5 hour of 5 minute data for KOXB
Terminal Aerodrome Forecast (TAF) for KOXB
Wind History Graph: OXB
(wind in knots)
GEOS Local Image of east us
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