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Marine Weather and Tides
Version 3.4 |
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 6:30AM | Sunset 8:21PM | Thursday July 29, 2021 6:09 PM EDT (22:09 UTC) | Moonrise 11:01PM | Moonset 10:59AM | Illumination 70% |  |
AMZ330 Charleston Harbor- 329 Pm Edt Thu Jul 29 2021
Tonight..S winds 5 to 10 kt, becoming sw late.
Fri..SW winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Waves 1 to 2 ft.
Fri night..SW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Waves 1 to 2 ft.
Sat..W winds 5 to 10 kt, becoming sw 10 to 15 kt in the afternoon. A slight chance of showers and tstms in the afternoon.
Sat night..SW winds 10 kt. A chance of showers and tstms.
Sun..SW winds 10 to 15 kt. A slight chance of showers and tstms in the morning, then a chance of showers and tstms in the afternoon.
Sun night..SW winds 10 to 15 kt with gusts to 20 kt. A chance of showers and tstms.
Mon..SW winds 10 to 15 kt. Showers and tstms likely.
Mon night..SW winds 10 to 15 kt. Showers and tstms.
Tue..SW winds 10 to 15 kt. Showers and tstms.
Tue night..SW winds 10 to 15 kt. Showers and tstms likely. Mariners are reminded that winds and waves higher in and near tstms. Unless otherwise noted, waves 1 foot or less. Charleston harbor water temperature 85 degrees.
Tonight..S winds 5 to 10 kt, becoming sw late.
Fri..SW winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Waves 1 to 2 ft.
Fri night..SW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Waves 1 to 2 ft.
Sat..W winds 5 to 10 kt, becoming sw 10 to 15 kt in the afternoon. A slight chance of showers and tstms in the afternoon.
Sat night..SW winds 10 kt. A chance of showers and tstms.
Sun..SW winds 10 to 15 kt. A slight chance of showers and tstms in the morning, then a chance of showers and tstms in the afternoon.
Sun night..SW winds 10 to 15 kt with gusts to 20 kt. A chance of showers and tstms.
Mon..SW winds 10 to 15 kt. Showers and tstms likely.
Mon night..SW winds 10 to 15 kt. Showers and tstms.
Tue..SW winds 10 to 15 kt. Showers and tstms.
Tue night..SW winds 10 to 15 kt. Showers and tstms likely. Mariners are reminded that winds and waves higher in and near tstms. Unless otherwise noted, waves 1 foot or less. Charleston harbor water temperature 85 degrees.
AMZ300 329 Pm Edt Thu Jul 29 2021
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. High pressure will build over the area into Friday night. A cold front will then stall over or just north of the area through the middle of next week.
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. High pressure will build over the area into Friday night. A cold front will then stall over or just north of the area through the middle of next week.
7 Day Forecast for Marine Location Near Mount Pleasant, SC
Hourly EDIT Help
location: 32.93, -79.83 debug
Area Discussion for - Charleston, SC
(on/off) Help NOTE: mouseover dotted underlined text for definitionFXUS62 KCHS 292000 AFDCHS
Area Forecast Discussion National Weather Service Charleston SC 400 PM EDT Thu Jul 29 2021
SYNOPSIS. High pressure will build over the area into Friday night. A cold front will then stall over or just north of the area through the middle of next week.
NEAR TERM /UNTIL 6 AM FRIDAY MORNING/. After sunset, marginal cu field will dissipate, resulting in clear skies overnight. Can't rule out some cirrus dropping in from the north late tonight. Lows will be in the mid/upper 70s.
SHORT TERM /6 AM FRIDAY MORNING THROUGH SUNDAY/. Forecast confidence: Moderate.
Deep high pressure into Friday night across the SC Lowcountry/GA Coastal Empire will give way to an approaching cold front by this weekend. The main concern this period will be the potential for excessive heat, which would really be the first time this year.
On Friday, the low-level flow will be more west-southwest and ridging will be strongest which will limit the sea breeze influence and overall risk for convection. Temperatures should push toward the century mark inland with even coastal areas possibly touching 90 degrees. The biggest forecast challenge is dewpoint temperatures which will likely lower inland during the day but surge near the coast late. At this point we are forecasting heat indices peaking close to 115 degrees just inland from the immediate coast and we have thus issued an Excessive Heat Watch there with a Heat Advisory for slightly lower heat indices for much of the rest of the Lowcountry/Coastal Empire except for areas well inland toward the CSRA where confidence is lowest in reaching heat indices of 110 degrees. Some shortwave energy could help spark a few showers/storms Friday night, mainly in SC, although we left rain chances at about 10 percent or less for now due to low confidence. Lows Friday night will be above normal in the mid to upper 70s most spots with lower 80s near the coast.
Saturday: The front looks to be closer to the area so despite a bit more cloud cover to start it should be another hot day with highs in the mid to upper 90s most inland spots, possibly touching 100 degrees, especially in GA. Heat indices could once again near 115 degrees in spots just inland from the beaches but should at least reach Heat Advisory levels most areas. Some more shortwave energy aloft and the pinned sea breeze could be enough to spark off isolated to scattered showers/storms mostly later in the day. A few of these storms could become severe. Storms will wind down later Saturday night with lows mainly in the upper 70s inland.
Sunday: The pattern is about the same although the mid level troughing is a bit weaker which should lead to a bit better rain chances, especially later in the day once the sluggish sea breeze gets going. Heat indices could once again reach 110 degrees for some areas so additional Heat Advisories will be possible.
LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/. Forecast confidence: Moderate.
Deep troughing should prevail keeping the weather more unsettled and cooler than normal. Some periods of heavy rain are possible.
AVIATION /20Z THURSDAY THROUGH TUESDAY/. VFR.
Extended Aviation Outlook: High confidence in mostly VFR conditions at KCHS/KJZI/KSAV through early Sunday afternoon although some restrictions will be possible late Saturday due to showers/storms. There looks to be a greater risk for restrictions from periodic showers/storms starting Sunday night as deeper moisture move into the area.
MARINE. Tonight: South to southwest winds will pick up to 10-15 kt overnight in response to lee-side troughing that develops well to the west. Seas will average 1-2 ft.
Friday through Tuesday: Moderate confidence this period. Atlantic high pressure will prevail with a stalled front inland. Winds could get near Small Craft Advisory levels at times, especially Friday afternoon/evening near the Charleston County coast.
CHS WATCHES/WARNINGS/ADVISORIES. GA . Excessive Heat Watch from Friday afternoon through Friday evening for GAZ117-119-139-141. Heat Advisory from 1 PM to 7 PM EDT Friday for GAZ101-116-118- 137-138-140. SC . Excessive Heat Watch from Friday afternoon through Friday evening for SCZ044-045-048>052. Heat Advisory from 1 PM to 7 PM EDT Friday for SCZ042-043-047. MARINE . None.
NEAR TERM . JRL SHORT TERM . RJB LONG TERM . RJB AVIATION . JRL/RJB MARINE . JRL/RJB
Weather Reporting Stations
EDIT (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 |
| 41029 - Capers Nearshore (CAP 2) | 14 mi | 61 min | S 9.7 G 12 | 84°F | 85°F | 1015.2 hPa | ||
| 41065 | 14 mi | 81 min | 85°F | 2 ft | ||||
| FBIS1 - Folly Island, SC | 17 mi | 69 min | SSE 7 G 7 | 84°F | 1016.3 hPa (-0.8) | |||
| ACXS1 - ACE Basin Reserve, SC | 42 mi | 84 min | Calm | 89°F | 1016 hPa | 77°F | ||
| NIWS1 - North Inlet-Winyah Bay Reserve, SC | 45 mi | 84 min | SE 8 | 86°F | 1015 hPa | 76°F | ||
| 41004 - EDISTO - 41 NM Southeast of Charleston, SC | 49 mi | 39 min | SE 3.9 G 5.8 | 83°F | 84°F | 1015.8 hPa | 74°F |
Wind History for Charleston, SC
(wind in knots) EDIT (on/off) Help| Last 24hr | ||||||||||||||||||||||||
| 1 day ago | ||||||||||||||||||||||||
| 2 days ago |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports. Follow links for more data.| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| Mount Pleasant Regional-Faison Field, SC | 3 mi | 74 min | N 0 G 10 | 9.00 mi | Fair | 88°F | 79°F | 75% | 1015.2 hPa |
| Charleston, Charleston Air Force Base, SC | 11 mi | 73 min | SSW 7 | 10.00 mi | Partly Cloudy | 90°F | 76°F | 63% | 1014.9 hPa |
| Charleston Executive Airport, SC | 18 mi | 74 min | SSE 7 | 10.00 mi | Fair | 88°F | 77°F | 70% | 1015.6 hPa |
| Moncks Corner Berkeley County, SC | 21 mi | 74 min | N 0 | 10.00 mi | Fair | 90°F | 73°F | 59% | 1015.2 hPa |
Link to 5 minute data for KLRO
Wind History from LRO (wind in knots)
| 7 PM | 8 PM | 9 PM | 10 PM | 11 PM | 12 AM | 1 AM | 2 AM | 3 AM | 4 AM | 5 AM | 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | |
| Last 24hr | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | S | |
| 1 day ago | S | Calm | Calm | Calm | Calm | S | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | ||
| 2 days ago | SE | SE | SE | Calm | Calm | S | Calm | S | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | SE G10 | S G11 | SE |
Tide / Current Tables for Cainhoy, Wando River, South Carolina
EDIT Weekend mode (on/off) (on/off) Help One Week of DataCainhoy
Click for Map
Thu -- 01:19 AM EDT 6.30 feet High Tide
Thu -- 06:31 AM EDT Sunrise
Thu -- 07:09 AM EDT 0.30 feet Low Tide
Thu -- 11:59 AM EDT Moonset
Thu -- 01:46 PM EDT 5.97 feet High Tide
Thu -- 07:28 PM EDT 0.89 feet Low Tide
Thu -- 08:20 PM EDT Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Thu -- 01:19 AM EDT 6.30 feet High Tide
Thu -- 06:31 AM EDT Sunrise
Thu -- 07:09 AM EDT 0.30 feet Low Tide
Thu -- 11:59 AM EDT Moonset
Thu -- 01:46 PM EDT 5.97 feet High Tide
Thu -- 07:28 PM EDT 0.89 feet Low Tide
Thu -- 08:20 PM EDT Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
| 12 am | 1 am | 2 am | 3 am | 4 am | 5 am | 6 am | 7 am | 8 am | 9 am | 10 am | 11 am | 12 pm | 1 pm | 2 pm | 3 pm | 4 pm | 5 pm | 6 pm | 7 pm | 8 pm | 9 pm | 10 pm | 11 pm |
| 5.8 | 6.3 | 6.1 | 5.2 | 3.8 | 2.2 | 0.9 | 0.3 | 0.6 | 1.6 | 2.8 | 4.1 | 5.1 | 5.8 | 5.9 | 5.4 | 4.3 | 3 | 1.7 | 1 | 1 | 1.7 | 2.8 | 3.9 |
Tide / Current Tables for Charleston Harbor Entrance, South Carolina Current
EDIT (on/off) Help One Week of DataCharleston Harbor Entrance
Click for Map
Thu -- 12:53 AM EDT -0.00 knots Slack
Thu -- 04:11 AM EDT -2.14 knots Max Ebb
Thu -- 06:31 AM EDT Sunrise
Thu -- 07:20 AM EDT 0.00 knots Slack
Thu -- 09:35 AM EDT 1.42 knots Max Flood
Thu -- 11:59 AM EDT Moonset
Thu -- 01:20 PM EDT -0.00 knots Slack
Thu -- 04:37 PM EDT -1.85 knots Max Ebb
Thu -- 07:48 PM EDT 0.00 knots Slack
Thu -- 08:19 PM EDT Sunset
Thu -- 09:58 PM EDT 1.19 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Thu -- 12:53 AM EDT -0.00 knots Slack
Thu -- 04:11 AM EDT -2.14 knots Max Ebb
Thu -- 06:31 AM EDT Sunrise
Thu -- 07:20 AM EDT 0.00 knots Slack
Thu -- 09:35 AM EDT 1.42 knots Max Flood
Thu -- 11:59 AM EDT Moonset
Thu -- 01:20 PM EDT -0.00 knots Slack
Thu -- 04:37 PM EDT -1.85 knots Max Ebb
Thu -- 07:48 PM EDT 0.00 knots Slack
Thu -- 08:19 PM EDT Sunset
Thu -- 09:58 PM EDT 1.19 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
| 12 am | 1 am | 2 am | 3 am | 4 am | 5 am | 6 am | 7 am | 8 am | 9 am | 10 am | 11 am | 12 pm | 1 pm | 2 pm | 3 pm | 4 pm | 5 pm | 6 pm | 7 pm | 8 pm | 9 pm | 10 pm | 11 pm |
| 0.7 | -0.1 | -1 | -1.7 | -2.1 | -1.9 | -1.2 | -0.3 | 0.6 | 1.3 | 1.4 | 1.2 | 0.9 | 0.3 | -0.5 | -1.3 | -1.7 | -1.8 | -1.4 | -0.7 | 0.2 | 0.9 | 1.2 | 1 |
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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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