Tuesday, July14, 2020
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Marine Weather and Tides
Surfside Beach, SC

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 6:14AMSunset 8:28PM Tuesday July 14, 2020 3:29 AM EDT (07:29 UTC) Moonrise 12:41AMMoonset 2:01PM Illumination 36% Phase: Waning Crescent; Moon at 24 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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AMZ254 Coastal Waters From Little River Inlet To Murrells Inlet Sc Out 20 Nm- 312 Am Edt Tue Jul 14 2020
Today..N winds 5 to 10 kt, becoming se this afternoon. Seas 2 to 3 ft.
Tonight..S winds 5 to 10 kt. Seas 2 to 3 ft.
Wed..E winds 5 to 10 kt. Seas 2 ft.
Wed night..E winds 5 to 10 kt. Seas 2 ft.
Thu..E winds 5 to 10 kt. Seas 2 ft. A slight chance of showers and tstms.
Thu night..E winds 5 to 10 kt. Seas 2 ft.
Fri..SE winds 5 to 10 kt. Seas 2 ft.
Sat..S winds 5 to 10 kt. Seas 2 ft. Winds and seas higher in and near tstms.
AMZ200 312 Am Edt Tue Jul 14 2020
Synopsis for coastal waters from surf city north carolina to south santee river south carolina out to 20 nautical miles.. A weak front stalled just offshore will dissipate tonight. High pressure will build south along the east coast Wednesday and Thursday, moving away from the area Friday and Saturday.


7 Day Forecast for Marine Location Near Surfside Beach, SC
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location: 33.58, -78.88     debug


Area Discussion for - Wilmington, NC
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FXUS62 KILM 140709 AFDILM

Area Forecast Discussion National Weather Service Wilmington NC 309 AM EDT Tue Jul 14 2020

SYNOPSIS. A ridge of high pressure will build over the area through the week, maintaining hot and humid weather along with isolated thunderstorms. Storms could increase in coverage again this weekend, as the ridge flattens and brings the storm track a little closer to the area.

NEAR TERM /THROUGH WEDNESDAY/. Slightly drier air has built into the Carolinas the wake of yesterday's convection and weak surface cold front now stalling just off the coast. The bigger changes have actually occurred aloft where the atmosphere is now sharply drier and a little warmer due to subsidence downstream of an upper ridge building in from the west. From a thermodynamic standpoint these changes should limit the coverage and intensity of any convection today as rising parcels will contend with a cap 10-20kft aloft and very dry air above 700 millibars. I'm only forecasting a slight chance (20 percent) of a shower or t-storm today in a few spots (seabreeze zone and Sandhills) with dry weather prevailing elsewhere. Highs should again rise into the 90s almost everywhere with heat indices 100+ degrees.

Mostly clear and quiet tonight with lows 73-77. A little stronger onshore wind on Wednesday may keep temperatures down a couple of degrees versus today, however dewpoints in the 70s will still produce heat indices near 100 degrees. Only isolated showers or storms are possible Wednesday despite a little more Atlantic moisture since the upper ridge will be located almost directly overhead.

SHORT TERM /WEDNESDAY NIGHT THROUGH THURSDAY NIGHT/. The story for the short term will be a brief push of slightly cooler and drier air from the northeast. Some highs in the upper 80s are actually showing p in the forecast for Thursday. The mid levels will be very dry and generally hostile to convection although some sea breeze isolated activity cannot be ruled out.

LONG TERM /FRIDAY THROUGH MONDAY/. After a very brief and somewhat isolated reprieve from the summertime doldrums hot and humid conditions return for the extended period. Trends are for the East to West oriented mid level ridge to control conditions through about Saturday or so, a little longer than previous cycles. Overall for the forecast the storyline of increasing pops remains intact incorporating the recent trend. As for temperatures, perhaps a slight cooling trend late in the period with the increase in moisture but overall heat index values will continue to merit a look see each afternoon.

AVIATION /07Z TUESDAY THROUGH SATURDAY/. Except for patchy ground fog inland this morning and perhaps some shreds of low stratus, VFR conditions should prevail over the next 24 hours. Light northeasterly winds this morning will turn southeasterly this afternoon near the coast but speeds should remain 10 kt or less. Although an isolated shower or t-storm is possible near the coast this afternoon along the seabreeze front, the atmosphere is much drier aloft today versus yesterday and should keep convective coverage few and far between.

Extended Outlook . Brief MVFR/IFR conditions possible in scattered diurnal convection, however coverage should be 20 percent or less each day.

MARINE. A weak front stalling off the coast this morning should lead to light northeast winds. However this afternoon's seabreeze should veer winds more directly onshore. Speeds should remain 10 kt or less. By Wednesday high pressure building down the East Coast from New England will establish a little better synoptic gradient and east winds should average 10 kt. There's still a southeast fresh swell at 7 seconds period that will be our dominant wave group today. Wave heights measured by buoys around 4 feet this morning should slowly decrease throughout the day, and will average only 2 feet by late tonight into Wednesday.

A very subtle northeast flow will be in place for a few hours shifting quickly to southeast via the sea breeze and synoptic conditions. This flow will be in place through about Saturday with more of a southwest flow developing later in the weekend into early next week as the Piedmont Trough becomes a bit more prominent. Still wind speeds should be ten knots or so at most with maybe a slight increase early next week. Significant seas will be mostly in a 2-3 ft narrow range.


ILM WATCHES/WARNINGS/ADVISORIES. SC . None. NC . None. MARINE . None.

SYNOPSIS . ILM NEAR TERM . TRA SHORT TERM . SHK LONG TERM . SHK AVIATION . TRA MARINE . TRA/SHK


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NIWS1 - North Inlet-Winyah Bay Reserve, SC 23 mi105 min NNW 1.9 74°F 1012 hPa73°F
41024 - Sunset Nearshore (SUN 2) 28 mi82 min N 7.8 G 12 76°F 82°F1012.5 hPa
41119 28 mi73 min 82°F3 ft
41108 47 mi60 min 84°F4 ft

Wind History for Springmaid Pier, SC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Myrtle Beach International Airport, SC8 mi34 minNNW 410.00 miFair73°F72°F96%1012.9 hPa
North Myrtle Beach Grand Strand Airport, SC18 mi37 minN 010.00 miFair73°F70°F90%1012.7 hPa
Conway Horry County Airport, SC21 mi35 minN 010.00 miPartly Cloudy68°F68°F100%1013.2 hPa

Link to 5 minute data for KMYR

Wind History from MYR (wind in knots)
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Last 24hrS7SW8SW4SW5SW4SW4S5S10S10S12S14S13S13
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NE8----W4NW5CalmCalmCalmCalmNW5NW4
1 day agoCalmCalmCalmCalmW5CalmCalmSE4SE8SE10NW10
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2 days agoNW8N8SE3CalmS3SW5W53S3SE9SE10SE10SE9S10S8S12SW4S5CalmCalmSW5SW3CalmCalm

Tide / Current Tables for Myrtle Beach (Springmaid Pier), South Carolina
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Myrtle Beach (Springmaid Pier)
Click for Map
Tue -- 01:40 AM EDT     Moonrise
Tue -- 02:56 AM EDT     4.31 feet High Tide
Tue -- 06:16 AM EDT     Sunrise
Tue -- 08:56 AM EDT     0.88 feet Low Tide
Tue -- 03:00 PM EDT     Moonset
Tue -- 03:26 PM EDT     4.99 feet High Tide
Tue -- 08:26 PM EDT     Sunset
Tue -- 09:51 PM EDT     1.58 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.93.64.14.34.13.42.51.71.10.91.11.82.73.74.54.94.94.43.72.82.11.71.61.8

Tide / Current Tables for Springmaid Pier, Atlantic Ocean, South Carolina
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Weather Map
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wmap_A
GEOS Local Image of Southeast    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 Wilmington, NC (3,6,7,8)
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Ground Weather Radar Station Wilmington, NC
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Disclaimer:
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.