Marine Weather and Tides
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.
|Sunrise 6:13AM||Sunset 8:34PM||Wednesday June 28, 2017 1:23 AM EDT (05:23 UTC)||Moonrise 10:09AM||Moonset 11:18PM||Illumination 17%|
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|AMZ330 Charleston Harbor- 730 Pm Edt Tue Jun 27 2017 |
Tonight..SE winds 5 to 10 kt, becoming ne after midnight.
Wed..E winds 5 to 10 kt.
Wed night..E winds 5 to 10 kt.
Thu..E winds 10 to 15 kt. A slight chance of showers and tstms in the afternoon.
Thu night..SE winds 5 to 10 kt. A slight chance of showers and tstms.
Fri..S winds 5 kt. A chance of showers and tstms.
Fri night..S winds 5 to 10 kt. A chance of showers and tstms.
Sat..SW winds 5 to 10 kt. A chance of showers and tstms.
Sat night..SW winds 5 to 10 kt. A chance of showers and tstms.
Sun..SW winds 5 to 10 kt. A chance of showers and tstms.
Sun night..SW winds 5 to 10 kt. A chance of showers and tstms. Mariners are reminded that winds and waves higher in and near tstms. Unless otherwise noted, waves 1 foot or less. Charleston harbor water temperature 84 degrees.
|AMZ300 730 Pm Edt Tue Jun 27 2017 |
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. A stationary front will linger to the se of the area tonight. High pressure will pass north of the region Wednesday, then shift into the atlantic Thursday. A surface trough will develop inland on Friday and prevail into the weekend.
7 Day Forecast for Marine Location Near Goose Creek, SCHourly EDIT Help
Area Discussion for - Charleston, SC  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus62 kchs 280144|
area forecast discussion
national weather service charleston sc
944 pm edt Tue jun 27 2017
A cold front will gradually move through the area this weekend,
moving off the coast Monday. Drier high pressure will build in
from the northwest for much of next week before moving offshore
Near term until 6 am Wednesday morning
Convection has ended everywhere except across the ga marine
waters as drier high pressure gradually builds from the north.
With the sea breeze now progressing far inland the threat for an
isolated shower across land areas has mostly ended. Given
dewpoints now in the 60s, another slightly cooler night is in
store with lows dropping into the mid upper 60s away from the
Short term 6 am Wednesday morning through Friday
Heights aloft will gradually build through the period as broad
troughing shifts off the northeast coast and weak ridging builds in
from the south. Close proximity to surface high pressure over the
mid-atlantic will ensure that Wednesday remains dry for most of the
area outside of the altamaha river region, where subsidence will be
weaker and moisture marginally better.
Moisture will be on the increase Thursday and Friday as high
pressure shifts offshore and low level flow backs more south to
southwesterly, bringing a moist, conditionally unstable airmass back
into the region. Shower and thunderstorm initiation will occur
mainly along the seabreeze corridor each afternoon, but with overall
unimpressive lapse rates, severe threat will remain limited. Have
opted for pops slightly above climo mainly along and south of i-16,
where moisture content will be greatest, Thursday. Moisture will
have overspread the area by Friday as a weak surface through
develops inland, and pops have been maintained slightly above climo
for the entire area to reflect this. Global models are hinting at
the passage of a weak mid-level wave Friday, which may further
enhance convective initiation and coverage.
Temps will be near normal through the period, with most variations
owing to cloud cover and precip coverage.
Long term Friday night through Tuesday
Nearly zonal flow will persist aloft with surface high pressure in
the atlantic. Southerly flow around the high will advect plenty of
moisture into the southeast as an inland trough develops this
weekend. The result will be the typical summertime
shower thunderstorm pattern with the coverage and intensity trending
upwards each day into the weekend.
Aviation 02z Wednesday through Sunday
Vfr expected through Wed as drier high pressure dominates.
Extended aviation outlook:VFR conditions will prevail. Brief flight
restrictions in showers and thunderstorms are possible at ksav
Thursday, then both ksav and kchs through the end of the week.
Tonight: a stationary front will meander s-se of the local area,
as continental high pressure from the ohio valley gradually
expands overhead with rising pressures. Easterly winds as high
as 10 or 15 kt this evening will back to NE with some land
breeze influences late, allowing for winds to back around to
the NE at similar speeds. Seas will remain near 2 ft within 20
nm of the coast, up to 3 ft across the eastern half of the outer
Wednesday through Sunday: high pressure sliding from the mid-
atlantic coast to its more seasonally typical bermuda high
location will remain in control through the period. Expect
mainly light to moderate breezes, with the usual summertime sea
breeze wind enhancements near the coast in the afternoon. Seas
will remain mainly in the 2 to 3 foot range in small southeast
swell and minor local windswell.
Rip currents: dependent upon how much swell energy reaches the
beaches on Wednesday will determine the exact risk of rip
currents. Since there is uncertainty at this time we prefer to
go with a low risk.
Tides coastal flooding
Tides continue to run about a foot above predicted and it looks
as though we'll break the 7.0 ft mllw coastal flood advisory
threshold in charleston around midnight. Thus, issued an
advisory for the midnight high tide.
Chs watches warnings advisories
Sc... Coastal flood advisory until 1 am edt Wednesday for scz048>050.
Near term... Jrl
tides coastal flooding...
Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
|Stations||Dist||Age||Wind||Air Temp||Water Temp||Waves||Pressure||DewPt|
|CHTS1||15 mi||53 min||NNW 1.9 G 2.9||79°F||84°F||1018.1 hPa|
|FBIS1 - Folly Island, SC||22 mi||83 min||Calm G 1||79°F||1018.4 hPa (+1.4)||66°F|
|41029 - Capers Nearshore (CAP 2)||22 mi||75 min||SSW 1.9 G 1.9||85°F||83°F||1017.7 hPa|
|ACXS1 - ACE Basin Reserve, SC||41 mi||98 min||Calm||72°F||1018 hPa||71°F|
|NIWS1 - North Inlet-Winyah Bay Reserve, SC||47 mi||98 min||NW 4.1||73°F||1018 hPa||69°F|
Wind History for Charleston, SC(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Charleston, Charleston Air Force Base, SC||8 mi||87 min||N 4||10.00 mi||Overcast||72°F||66°F||82%||1017.9 hPa|
|Mount Pleasant Regional-Faison Field, SC||11 mi||48 min||N 0||10.00 mi||Fair||72°F||69°F||94%||1018.3 hPa|
|Moncks Corner Berkeley County, SC||14 mi||28 min||N 0||7.00 mi||Fair||68°F||66°F||94%||1018.3 hPa|
|Summerville Airport, SC||18 mi||28 min||N 0||10.00 mi||Fair||70°F||68°F||94%||1018.6 hPa|
|Charleston Executive Airport, SC||21 mi||28 min||N 0||mi||72°F||69°F||94%||1017.9 hPa|
Wind History from CHS (wind in knots)
|1 day ago||N||N||Calm||NW||N||N||N||NE||NE||NE||NE||NE|
|2 days ago||SW||SW||SW||SW||NW||W||NW||NW||NW||NW||W||SW||SW||SW||N||E||N||N||S||Calm||S||Calm||Calm||Calm|
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
|Back River Reservoir |
Click for Map
Wed -- 05:38 AM EDT 1.05 feet High Tide
Wed -- 06:13 AM EDT Sunrise
Wed -- 11:08 AM EDT Moonrise
Wed -- 12:15 PM EDT -0.31 feet Low Tide
Wed -- 06:18 PM EDT 0.90 feet High Tide
Wed -- 08:32 PM EDT Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
EDIT (on/off)  Help One Week of Data
|Charleston Harbor Entrance |
Click for Map
Wed -- 12:28 AM EDT -0.00 knots Slack
Wed -- 03:40 AM EDT -2.77 knots Max Ebb
Wed -- 06:14 AM EDT Sunrise
Wed -- 06:54 AM EDT 0.00 knots Slack
Wed -- 09:10 AM EDT 1.53 knots Max Flood
Wed -- 11:08 AM EDT Moonrise
Wed -- 01:00 PM EDT -0.00 knots Slack
Wed -- 04:05 PM EDT -2.38 knots Max Ebb
Wed -- 07:08 PM EDT 0.00 knots Slack
Wed -- 08:31 PM EDT Sunset
Wed -- 09:27 PM EDT 1.61 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Weather Map and Satellite Images(on/off)  Help
|Weather Map ||IR Satellite Image from GEOS|
GOES Local Image of Southeast EDIT
Wind Forecast for Charleston, SC (1,6,7,8)(on/off)  Help
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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 numerious 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.