Tuesday, July27, 2021
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Marine Weather and Tides
Bethany Beach, DE

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 5:59AMSunset 8:18PM Tuesday July 27, 2021 2:54 AM EDT (06:54 UTC) Moonrise 9:50PMMoonset 8:36AM Illumination 91% Phase: Waning Gibbous; Moon at 18 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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ANZ455 Coastal Waters From Cape Henlopen To Fenwick Island De Out 20 Nm- 104 Am Edt Tue Jul 27 2021
Rest of tonight..W winds 5 to 10 kt. Seas around 3 ft. SWell mainly from the S with a dominant period of 6 seconds.
Tue..W winds around 5 kt, becoming S in the afternoon. Seas around 3 ft in the morning, then 2 ft or less. SWell mainly from the se with a dominant period of 8 seconds.
Tue night..SW winds 5 to 10 kt. Seas 2 ft or less. SWell mainly from the se with a dominant period of 10 seconds.
Wed..NW winds 5 to 10 kt, becoming E in the afternoon. Seas around 3 ft. SWell mainly from the se with a dominant period of 8 seconds.
Wed night..SE winds 5 to 10 kt. Seas around 3 ft.
Thu..S winds 10 to 15 kt. Seas around 3 ft.
Thu night..SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. A chance of tstms. Light swell in the evening.
Fri..NW winds 5 to 10 kt. Seas 3 to 4 ft.
Fri night..N winds 5 to 10 kt. Gusts up to 20 kt after midnight. Seas around 3 ft.
Sat..N winds 5 to 10 kt, becoming E in the afternoon. Seas around 3 ft.
Sat night..S winds 5 to 10 kt. Seas 2 ft or less. Winds and seas higher in and near tstms.
ANZ400 104 Am Edt Tue Jul 27 2021
Synopsis for the coastal waters from sandy hook nj to fenwick island de and for delaware bay.. High pressure builds into the region tonight into early Tuesday. A couple of weak disturbances will cross the region late Tuesday and Wednesday. A stronger cold front will then arrive on Thursday. High pressure follows for Friday and Saturday, with the approach of another cold front possible by Sunday.


7 Day Forecast for Marine Location Near Bethany Beach, DE
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location: 38.53, -75.05     debug


Area Discussion for - Philadelphia/Mount Holly, PA
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FXUS61 KPHI 262359 AFDPHI

Area Forecast Discussion National Weather Service Mount Holly NJ 759 PM EDT Mon Jul 26 2021

SYNOPSIS. High pressure builds into the region tonight into early Tuesday. A couple of weak disturbances will cross the region late Tuesday and Wednesday. A stronger cold front will then arrive on Thursday. High pressure follows for Friday and Saturday, with the approach of another cold front possible by Sunday.

NEAR TERM /THROUGH TUESDAY/. Cold front has sunk through most of the forecast area and is just south of New Jersey, extending through central Delmarva. North of the front, surface dew points have dropped into the 50s and 60s. South of the front, dew points are still well in the 70s. Convection has tapered off, and with mid level dry air spreading into the region, that pretty much should be it for the night, but cannot rule out a few showers and/or storms through sunset or so.

Temps this evening should remain in the upper 60s to low 70s. With humidity levels still relatively high towards the coast and across DelMarVa, patchy fog certainly seems likely and MRi's from Bukfit soundings support this.

Heading into the day Tuesday, brief high pressure develops and skies should be mostly clear skies with northwesterly flow becoming westerly. With mostly clear skies and efficient heating, temperatures will warm to several degrees above normal sitting in the low to possibly mid 90s for most of the region with the mid 80s towards the higher terrain of the Poconos.

SHORT TERM /TUESDAY NIGHT THROUGH THURSDAY/. The short term period begins Tuesday night with a shortwave trough streaming in from the northwest. Ongoing convection should be making its way into eastern PA and northern NJ, but will be encountering a rather dry and increasingly unfavorable environment for maintenance of convection. This activity should thus wane in coverage in intensity and coverage into the evening hours. However, some showers or storms may be possible as far south as the I-95 corridor as the mid-level wave moves across the area into the overnight hours though.

Northwesterly flow will continue into Wednesday and some isolated to scattered convection is possible during the afternoon hours associated with another much weaker mid-level wave. The thermodynamics in place won't be particularly supportive of severe convection, thus the SPC has our area in a general thunderstorm risk. Any diurnal activity will diminish quickly into the evening.

Another more potent mid-level wave will approach the area on Thursday. Intensifying surface low pressure to our north along with an approaching frontal boundary from the northwest will result in low-level moisture return as the mean low-level flow turns southwesterly. This pattern could be quite favorable for a typical northwesterly flow MCS developing across the region, but the details and timing of this remain unclear.

Expect seasonable temperatures Wednesday and Thursday with high mostly in the 80s and lows in the 60s to around 70 degrees.

LONG TERM /THURSDAY NIGHT THROUGH MONDAY/. The long term period starts Thursday night into Friday with the primary synoptic trough axis moving offshore. This will bring a rather modest cold front across the region by mid-summer standards with low-level cool/dry air advection ramping up during the day Friday. Dewpoints are forecast to fall into the 50s amid a northwesterly breeze. A rather pleasant Friday and Saturday will result with temperatures below normal. Highs will be in the upper 70s to mid 80s with lows in the 50s to low 60s Friday night. Needless to say, the Friday-Saturday time frame looks dry.

Moisture and warm and return resumes Sunday as another trough axis approaches from the northwest. Chances for showers and thunderstorms appear to also return Sunday and into Monday.

AVIATION /00Z TUESDAY THROUGH SATURDAY/. The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG, KILG, KMIV, KACY and surrounding areas.

Tonight . Generally VFR. Patchy MVFR fog development possible after 06z especially at KMIV/KACY. I-95. Winds light and variable or calm. Moderate confidence.

Tuesday . VFR conditions are expected. Showers and thunderstorms will approach the TAF sites from the northwest, but will likely be weakening. Winds should initially be northwesterly turning westerly by mid day. A see breeze at ACY may result in southerly winds of 5 to 10 kt early in the afternoon. Moderate confidence.

Outlook .

Tuesday night . Isolated showers or thunderstorms possible north of PHL, otherwise mostly VFR. Winds westerly around 5 kts or less becoming more northwesterly after 06Z. Moderate confidence.

Wednesday . Prevailing VFR. Isolated to scattered showers and thunderstorms. North to northwesterly winds around 5 kts. Moderate confidence.

Thursday . Initially VFR with showers and thunderstorms developing during the afternoon or evening. Winds southwesterly around 5-10 kts. Moderate confidence.

Friday . VFR. Winds northwesterly around 10-15 kts. High confidence.

MARINE. Winds and seas should stay below SCA criteria through Tuesday. Southwest winds of 10 to 15 kt with seas 3 to 4 ft are expected through this evening with a thunderstorm possible in the early evening. Overnight winds weaken and seas drop as the winds eventually shift towards the northwest. By mid day Tuesday, winds will flip back around to out of the south with 1 to 2 ft seas.

Outlook .

Sub-advisory conditions are forecast through the remainder of the week. Northeasterly winds around 10 kts Wednesday will become south to southwesterly Thursday and increase to around 10-15 kts. Winds then become northwesterly for Friday around 10-15 kts. Seas 2-4 feet. Showers and thunderstorms possible, mainly Thursday.

Rip Currents .

Light offshore flow in the morning will become onshore in the afternoon both Tuesday and Wednesday. Seas will average 1 to 3 feet. As a result, there is a LOW risk for the development of dangerous rip currents at New Jersey and Delaware beaches both Tuesday and Wednesday.

PHI WATCHES/WARNINGS/ADVISORIES. PA . None. NJ . None. DE . None. MD . None. MARINE . None.

Synopsis . O'Brien/Staarmann Near Term . Deal/MPS Short Term . Staarmann Long Term . Staarmann Aviation . Deal/MPS/Staarmann Marine . Deal/Staarmann


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
OCIM2 - 8570283 - Ocean City Inlet, MD 14 mi60 min NW 6 G 9.9 76°F 68°F1014.6 hPa
LWSD1 - 8557380 - Lewes, DE 18 mi60 min W 1 G 2.9 78°F 75°F1013.7 hPa
44009 - DELAWARE BAY 26 NM Southeast of Cape May, NJ 20 mi44 min W 5.8 G 7.8 73°F 72°F1013.5 hPa71°F
CMAN4 - 8536110 - Cape May, NJ 31 mi60 min S 1 G 1.9 75°F 73°F1013.6 hPa
BRND1 - 8555889 - Brandywine Shoal Light, DE 32 mi60 min WSW 8 G 8 1014.3 hPa
DRSD1 - Delaware Reserve, DE 44 mi84 min Calm 73°F 1014 hPa72°F

Wind History for Ocean City Inlet, MD
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Ocean City, Ocean City Municipal Airport, MD16 mi61 minWNW 58.00 miFair77°F76°F96%1013.7 hPa
Georgetown - Delaware Coastal Airport, DE20 mi60 minSW 36.00 miFog/Mist77°F74°F90%1013.8 hPa

Link to 5 minute data for KOXB

Wind History from OXB (wind in knots)
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1 day agoSW7SW12
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2 days agoCalmCalmW4W4W4W3NW4NW6CalmS5SE6SE9SE93S5S55SW86S8SW8
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Tide / Current Tables for Indian River Inlet (USCG Station), Delaware (2)
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Indian River Inlet (USCG Station)
Click for Map
Tue -- 05:27 AM EDT     -0.16 feet Low Tide
Tue -- 05:57 AM EDT     Sunrise
Tue -- 09:36 AM EDT     Moonset
Tue -- 12:05 PM EDT     2.23 feet High Tide
Tue -- 05:40 PM EDT     0.14 feet Low Tide
Tue -- 08:15 PM EDT     Sunset
Tue -- 10:50 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.52.11.50.90.3-0.1-0.10.20.71.31.72.12.22.11.71.10.60.20.20.40.91.41.92.2

Tide / Current Tables for Delaware Bay Entrance, Delaware Current
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Delaware Bay Entrance
Click for Map
Tue -- 12:53 AM EDT     -0.00 knots Slack
Tue -- 04:23 AM EDT     -1.59 knots Max Ebb
Tue -- 05:57 AM EDT     Sunrise
Tue -- 07:31 AM EDT     0.00 knots Slack
Tue -- 09:36 AM EDT     Moonset
Tue -- 10:10 AM EDT     1.37 knots Max Flood
Tue -- 01:16 PM EDT     -0.00 knots Slack
Tue -- 04:35 PM EDT     -1.24 knots Max Ebb
Tue -- 07:21 PM EDT     0.00 knots Slack
Tue -- 08:15 PM EDT     Sunset
Tue -- 10:23 PM EDT     1.56 knots Max Flood
Tue -- 10:50 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.7-0.1-0.8-1.3-1.6-1.5-1.1-0.40.411.41.20.80.2-0.4-0.9-1.2-1.2-0.9-0.20.51.11.51.5

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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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