Thursday, April2, 2020
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Marine Weather and Tides
East Hampton, NY

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 6:30AMSunset 7:18PM Thursday April 2, 2020 4:12 AM EDT (08:12 UTC) Moonrise 12:46PMMoonset 3:12AM Illumination 68% Phase: Waxing Gibbous; Moon at 9 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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ANZ350 Moriches Inlet Ny To Montauk Point Ny Out 20 Nm- 1236 Am Edt Thu Apr 2 2020
.small craft advisory in effect through late tonight...
.gale watch in effect from Friday morning through late Friday night...
Overnight..N winds 10 to 15 kt, becoming nw 15 to 20 kt late. Seas 4 to 6 ft.
Thu..NW winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 6 ft. Chance of rain in the afternoon.
Thu night..NW winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to 6 ft. Rain likely.
Fri..N winds 20 to 25 kt with gusts up to 35 kt. Seas 6 to 9 ft. Chance of rain.
Fri night..N winds 20 to 25 kt with gusts up to 35 kt. Seas 8 to 10 ft. Chance of rain in the evening.
Sat..NE winds 15 to 20 kt with gusts up to 30 kt, diminishing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 7 to 10 ft.
Sat night..E winds 5 to 10 kt. Seas 5 to 8 ft.
Sun..SE winds around 5 kt, becoming S in the afternoon. Seas 4 to 7 ft, subsiding to 4 to 5 ft in the afternoon.
Sun night..SW winds around 10 kt. Seas 3 to 5 ft.
Mon..W winds around 10 kt. Seas around 4 ft.
Mon night..W winds 5 to 10 kt. Seas around 3 ft.
ANZ300 1236 Am Edt Thu Apr 2 2020
Synopsis for the long island waters and new york harbor.. Deep low pressure well southeast of eastern long island will move slowly northeast overnight. The low then meanders well south and east of long island Thursday through Friday night. High pressure will build across the area this weekend before a weak cold front crosses the area Sunday night. High pressure then briefly returns on Monday.


7 Day Forecast for Marine Location Near East Hampton, NY
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location: 40.61, -71.94     debug


Area Discussion for - New York City/Upton, NY
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FXUS61 KOKX 020442 AFDOKX

Area Forecast Discussion National Weather Service New York NY 1242 AM EDT Thu Apr 2 2020

SYNOPSIS. Deep low pressure well southeast of eastern Long Island will move northeast overnight. The low then meanders well south and east of Long Island Thursday through Friday night. High pressure will build across the area this weekend before a weak cold front crosses the area Sunday night. High pressure then briefly returns on Monday, followed by an approaching frontal system for the middle of next week.

NEAR TERM /UNTIL 6 AM THIS MORNING/. Only minor changes with this update to better account for the latest observational trends, otherwise the forecast remains on track.

A strong and well organized low pressure southeast of Long Island has been captured by a large upper low/trough that is situated over the Eastern Seaboard.

The region will lie in subsidence tonight with dry conditions. Skies will be partly cloudy for much of the area. Moisture will continue to get pulled down the New England coast and move over Eastern Long Island and Southeastern Connecticut. This is where the highest sky cover is forecast.

Lows will be in the lower and middle 30s for most locations except for around 40 degrees in the NYC metro.

SHORT TERM /6 AM THIS MORNING THROUGH 6 PM FRIDAY/. The deep low offshore will lift north Thursday morning and then begin to retrograde westward as it becomes vertically stacked. A blocking regime across the North Atlantic and Southeast Canada will also help retrograde the whole system westward through Thursday night. On Friday, the system gradually shifts southward and then away from the coast once again.

Thursday will begin dry for the entire area. Clouds will gradually increase from east to west through the day as moisture from the offshore low begins to advect towards the region. Some rain bands are likely to be located to our east early in the morning. These rain bands will retrograde westward, especially in the afternoon and evening. It may take some time for the rain to make it across Eastern Long Island and Eastern Connecticut as they will encounter subsidence on the backside of the system. Middle level thermal forcing increase in the evening and this is when the highest probability for rain exists mainly east of the Hudson River. The rain bands should gradually weaken overnight Thursday into Friday morning as the forcing wanes. However, low and middle level moisture is going to hang around through Friday so some areas of light rain cannot be ruled out. Areas west of the NYC metro may largely stay dry as the retrograding rain bands encounter stronger subsidence to the west. Probabilities for rain decrease from west to east on Friday.

The pressure gradient between the offshore low and high pressure to the west will bring breezy conditions both Thursday and Friday. Wind gusts 25-30 mph are likely Thursday with potential for a few gusts up to 35 mph near the coast. Winds may weaken a bit Thursday night, but increase again Friday, especially across Eastern Long Island and Southeast Connecticut.

Temperatures will be near to slightly above normal for the end of the week.

LONG TERM /FRIDAY NIGHT THROUGH WEDNESDAY/. The surface and upper lows finally begin to pull away to the east Friday night. After a lingering chance of showers early across portions of Long Island and southeastern Connecticut, dry weather will return overnight along with gradually decreasing clouds. High pressure then builds across the region for the weekend, resulting in dry and at least partly sunny conditions.

Clouds will gradually increase Sunday afternoon as a weakening cold front approaches from the west. With the front weakening as it reaches the area, rain chances look fairly limited at this time, but think a few showers are possible Sunday evening into Sunday night. High pressure then briefly builds back across the area on Monday before the weather turns unsettled for the middle of the week as a frontal system approaches the area Tuesday into Wednesday. Numerous model differences remain in the timing and evolution of this system. For now have rain chances gradually increasing through the day on Tuesday with better chances on Wednesday, but it is likely that at least a portion of this period will remain dry.

After near normal highs on Saturday, temperatures through the remainder of the long term period will generally be above normal. Daytime highs will range from the low to mid 50s along the immediate south facing coasts to the low to mid 60s for NYC and areas north and west. Overnight lows will generally remain in the 40s.

AVIATION /03Z THURSDAY THROUGH MONDAY/. Low pressure well offshore will begin to exert its influence in terms of wind beginning late tonight. Expect N winds to back NW by late tonight and increase to 10-15G20kt before daybreak in the metros and along the coast, then increase throughout to 20-25G30kt by afternoon. Some light rain with MVFR cigs may back westward to KGON mid to late afternoon.

OUTLOOK FOR 00Z FRIDAY THROUGH MONDAY. Thursday night. MVFR cigs developing with chance rain N/E of the NYC metros. NW winds G30kt. Friday. MVFR cigs with chance rain. NW winds G25kt. Saturday through Monday. VFR.

MARINE. Strong low pressure well southeast of Long Island will track northeast overnight and into Thursday. The low then meanders south and east of Long Island into Friday. SCA conditions, mainly in seas, will continue on the ocean waters tonight. Winds increase on all waters to SCA levels Thursday into Thursday night. Winds on the non-ocean waters likely fall below SCA levels Thursday night. SCA conditions are then likely on the ocean waters and possibly Eastern LI Sound, and Eastern LI Bays on Friday. Gales are also possible on the waters east of Moriches Inlet Friday.

While winds will gradually decrease through the night, gale conditions may linger into Friday night on the ocean east of Moriches Inlet, with SCA gusts possible for portions of the eastern Long Island Sound, Peconic and Gardiners Bays, and the ocean waters west to Fire Island Inlet. Winds should then fall below SCA criteria on all waters Saturday morning, although seas will remain elevated on the ocean through the day on Sunday. Conditions are then expected to remain below SCA levels on Monday.

HYDROLOGY. No hydrologic impacts are expected through the middle of next week.

TIDES/COASTAL FLOODING. Minor coastal flooding benchmarks may be reached for Friday morning and Friday evening high tide cycles. The greatest potential for this to occur is for the South Shore Back Bays, with a lower risk across the Western Long Island Sound. More widespread minor coastal flooding is possible for Saturday mornings high tide.

EQUIPMENT. NYC NOAA Weather Radio Station KWO35 (162.55 MHz) is undergoing its final stages of testing, and is operating at full power.

OKX WATCHES/WARNINGS/ADVISORIES. CT . None. NY . None. NJ . None. MARINE . Small Craft Advisory from 8 AM this morning to 10 PM EDT this evening for ANZ330-335-338-340-345. Small Craft Advisory until 6 AM EDT Friday for ANZ350-353-355. Gale Watch from Friday morning through late Friday night for ANZ350.




Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MTKN6 - 8510560 - Montauk, NY 30 mi55 min 43°F 44°F1003.9 hPa
LDLC3 - New London Ledge CT - Ledge Light Weather 49 mi48 min NNW 16 G 20 42°F 1001.4 hPa29°F

Wind History for New London, CT
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
East Hampton, East Hampton Airport, NY0 mi78 minNNW 710.00 miFair41°F30°F65%1004.4 hPa

Link to 5 minute data for KHTO

Wind History from HTO (wind in knots)
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NE7E7NE8N7NE5CalmCalmCalmCalmCalmN3NW5N10
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N9N8N4N6CalmSE6E4E9E10E8E4E3CalmNE3CalmNE3E5NE5
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Tide / Current Tables for Promised Land, Napeague Bay, Long Island Sound, New York
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Promised Land
Click for Map
Thu -- 03:13 AM EDT     Moonset
Thu -- 04:29 AM EDT     2.39 feet High Tide
Thu -- 06:29 AM EDT     Sunrise
Thu -- 11:42 AM EDT     0.25 feet Low Tide
Thu -- 12:45 PM EDT     Moonrise
Thu -- 05:20 PM EDT     1.94 feet High Tide
Thu -- 07:15 PM EDT     Sunset
Thu -- 11:50 PM EDT     0.49 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.81.31.82.22.42.42.11.81.310.60.30.30.511.51.81.91.91.71.41.10.80.6

Tide / Current Tables for Montauk, Fort Pond Bay, Long Island Sound, New York
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Montauk
Click for Map
Thu -- 03:13 AM EDT     Moonset
Thu -- 04:30 AM EDT     2.02 feet High Tide
Thu -- 06:28 AM EDT     Sunrise
Thu -- 11:27 AM EDT     0.17 feet Low Tide
Thu -- 12:44 PM EDT     Moonrise
Thu -- 05:07 PM EDT     1.65 feet High Tide
Thu -- 07:14 PM EDT     Sunset
Thu -- 11:30 PM EDT     0.41 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.91.31.71.9221.81.51.20.90.50.20.20.611.31.51.71.61.41.10.90.70.4

Weather Map
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wmap_A
GEOS Local Image of Northeast    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for New York City/Upton, NY (4,6,7,8)
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Ground Weather Radar Station Upton, NY
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The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerous of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.