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 6:50AM||Sunset 6:14PM||Saturday February 24, 2018 2:55 AM EST (07:55 UTC)||Moonrise 12:47PM||Moonset 2:02AM||Illumination 66%|
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|AMZ330 Charleston Harbor- 1253 Am Est Sat Feb 24 2018 |
Rest of tonight..S winds 5 kt. Patchy fog late.
Sat..S winds 5 kt, increasing to 10 kt in the afternoon. Patchy fog in the morning.
Sat night..S winds 5 to 10 kt.
Sun..SW winds 10 to 15 kt. A slight chance of showers and tstms in the afternoon.
Sun night..SW winds 5 to 10 kt. A slight chance of tstms in the evening. A chance of showers.
Mon..SW winds 5 to 10 kt. A chance of showers.
Mon night..NW winds 5 kt, becoming N after midnight. A chance of showers in the evening.
Tue..NE winds 10 kt.
Tue night..E winds 5 to 10 kt.
Wed..E winds 5 to 10 kt. A chance of showers.
Wed night..S winds 5 to 10 kt. A slight chance of showers. Mariners are reminded that winds and waves higher in and near tstms. Unless otherwise noted, waves 1 foot or less. Charleston harbor water temperature 62 degrees.
|AMZ300 1253 Am Est Sat Feb 24 2018 |
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. Unseasonably warm high pressure will prevail into Sunday. A cold front will approach the region late Sunday before moving through Monday. High pressure is then expected until a warm front moves through Wednesday or Wednesday night followed by another cold front late in the week.
7 Day Forecast for Marine Location Near Kiawah Island, SCHourly EDIT Help
Area Discussion for - Charleston, SC  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus62 kchs 240610|
area forecast discussion
national weather service charleston sc
110 am est Sat feb 24 2018
Unseasonably warm high pressure will prevail into Sunday. A
cold front will approach the region late Sunday before moving
through Monday. High pressure is then expected until a warm
front moves through Wednesday or Wednesday night followed by
another cold front late in the week.
Near term until 6 am this morning
Overnight: we think stratus and fog will tend to expand along
and to the west of i-95 in ga and west of u.S. 17 in sc. The
should be at least locally dense and perhaps some better areal
coverage will develop prior to daybreak prompting dense fog
advisories. Our forecast in on track and only minor adjustments
were made on the update at midnight.
Short term 6 am this morning through Monday
A summer-like pattern will prevail into Sunday ahead of a cold
front which will approach late Sunday. Temperatures will be well
above normal through Sunday with low rain chances until
possibly late Sunday across inland areas where deeper moisture
and better forcing will align. Rain chances will likely peak
Sunday night and or Monday as the front moves into the area
along with deeper moisture and some upper-level forcing,
although timing of this is a bit tricky given the uncertainty in
timing of upper-level forcing. The front looks to be fairly
weak, as well as the instability, so do not anticipate much
rainfall or even significant thunder potential. Generally rain
amounts should be a quarter of an inch or less, but some places
could pick up a bit more, mainly closer to the pee
dee midlands csra. Also, conditions will support late
night early morning fog through at least Saturday, some of which
could be dense. By Sunday, low-level winds will be stronger and
less supportive of fog. The potential fly in the ointment
though would be if sea fog develops over the atlantic and moves
inland well beyond the morning hours pretty much either day over
Long term Monday night through Friday
A cold front will move offshore Monday night. High pressure
will pass to the north Tuesday, then move offshore Tuesday
night. A weak warm front may develop over the area Wednesday,
followed by a cold front approaching from the west on Thursday.
Aviation 06z Saturday through Wednesday
Both airports wereVFR at 06z with some ground fog noted.
Southerly flow was a tad stronger in the forecast soundings
overnight and this showed up with the somewhat higher fog
stability indices on NAM rap soundings. We maintained good
persistence with the 00z tafs backing off only slightly on
potential MVFR ifr times at ksav. After morning fog disperses
today,VFR will prevail again through this evening.
Extended aviation outlook: flight restrictions are likely each
night morning due to low clouds fog into Sunday. The risk for|
restrictions will increase Sunday night Monday as a cold front
moves into the area with low clouds rain.
Overnight: east-southeast winds will of 5 to 10 knots will
persist. Isolated showers possible, mainly beyond 15-20 nm
offshore. There is a small potential for some sea fog late
tonight, mainly the near shore waters south of the savannah
river, but confidence not high enough to put in forecast. Fog
expected over the land will likely get into the immediate
nearshore waters late tonight.
Saturday through Wednesday: atlantic high pressure will persist
across the area through the weekend. The pressure gradient will
increase a bit as a cold front approaches but winds will mainly
stay below 20 kt. However, southeast swells will continue and
could push seas up near advisory levels toward the gulf stream.
Otherwise, warm and moist air will remain in place and could
lead to the development of sea fog across the cooler nearshore
waters through this weekend. Northerly winds will then develop
by Tuesday behind a passing cold front and could increase close
to advisory levels. Seas will also build, possibly reaching
advisory levels beyond 20 nm.
Record highs for february 24:
kchs: 81 2017
ksav: 86 2012
kcxm: 81 1930
record high minimums for february 25:
kchs: 62 1992
ksav: 63 1992
kcxm: 61 2017
record highs for february 25:
kchs: 81 2017
ksav: 82 1985
kcxm: 80 1930
Chs watches warnings advisories
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|
|FBIS1 - Folly Island, SC||13 mi||56 min||SW 4.1 G 5.1||64°F||1026.3 hPa (-1.0)|
|CHTS1||16 mi||38 min||SSW 2.9 G 5.1||65°F||62°F||1025.6 hPa|
|ACXS1 - ACE Basin Reserve, SC||18 mi||71 min||Calm||61°F||1026 hPa||61°F|
|41033||27 mi||48 min||SE 1.9 G 5.8||60°F||62°F||1024.2 hPa|
|41029 - Capers Nearshore (CAP 2)||30 mi||48 min||S 3.9 G 7.8||59°F||64°F||1025.4 hPa|
|41004 - EDISTO - 41 NM Southeast of Charleston, SC||54 mi||26 min||S 3.9 G 5.8||69°F||68°F||1025.3 hPa||66°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 Executive Airport, SC||10 mi||61 min||N 0||9.00 mi||Partly Cloudy||64°F||64°F||100%||1026.1 hPa|
|Charleston, Charleston Air Force Base, SC||23 mi||60 min||SSW 5||6.00 mi||Shallow Fog||62°F||62°F||100%||1025.5 hPa|
Wind History from JZI (wind in knots)
|1 day ago||Calm||Calm||Calm||Calm||Calm||Calm||S||S||S|
|2 days ago||Calm||Calm||Calm||Calm||Calm||Calm||SE||Calm||Calm||S||S||S||S||S||S||S||SE||SE||SE||Calm||Calm||SE||S||S |
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
|Kiawah River Bridge |
Click for Map
Sat -- 02:02 AM EST Moonset
Sat -- 02:31 AM EST 5.79 feet High Tide
Sat -- 06:53 AM EST Sunrise
Sat -- 08:52 AM EST 0.45 feet Low Tide
Sat -- 12:47 PM EST Moonrise
Sat -- 03:00 PM EST 4.87 feet High Tide
Sat -- 06:13 PM EST Sunset
Sat -- 09:09 PM EST -0.08 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
EDIT (on/off)  Help One Week of Data
|Charleston Harbor Entrance |
Click for Map
Sat -- 02:01 AM EST Moonset
Sat -- 02:50 AM EST -0.00 knots Slack
Sat -- 06:14 AM EST -2.20 knots Max Ebb
Sat -- 06:53 AM EST Sunrise
Sat -- 09:19 AM EST 0.00 knots Slack
Sat -- 11:33 AM EST 1.44 knots Max Flood
Sat -- 12:46 PM EST Moonrise
Sat -- 03:02 PM EST -0.00 knots Slack
Sat -- 06:12 PM EST Sunset
Sat -- 06:34 PM EST -2.07 knots Max Ebb
Sat -- 09:31 PM EST 0.00 knots Slack
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 (2,6,7,8)(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.