Marine Weather and Tide Forecast for South Haven, MI
 | Sunrise 6:13 AM Sunset 9:09 PM Moonrise 2:33 AM Moonset 2:53 PM |
LMZ844 St Joseph To South Haven Mi- 405 Pm Edt Thu May 22 2025
.small craft advisory in effect until 2 am edt Friday - .
Through early evening - North winds to 30 knots. Mostly Sunny. Waves 5 to 7 feet.
Tonight - Northwest winds 15 to 25 knots. Partly cloudy. Waves 4 to 6 feet subsiding to 2 to 3 feet toward daybreak.
Friday - Northwest winds 15 to 20 knots. Sunny. Waves 2 to 3 feet.
Friday night - Northwest winds around 10 knots. Mostly clear. Waves 1 to 2 feet.
Saturday - North winds 10 to 15 knots. Sunny. Waves 1 to 2 feet.
Saturday night - North winds 5 to 10 knots. Partly cloudy. Waves around 1 foot.
Sunday - Northeast winds 5 to 10 knots backing north 10 to 15 knots. Mostly Sunny. Waves 1 to 2 feet.
Memorial day - Northeast winds 10 to 15 knots backing north late in the day. Partly Sunny. Waves 1 to 2 feet.
Tuesday - Northeast winds 10 to 15 knots. Partly Sunny with a chance of rain showers. Waves 2 to 3 feet.
LMZ800
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7 Day Forecast for Marine Location Near South Haven, MI
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Area Discussion for Grand Rapids, MI
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FXUS63 KGRR 221916 AFDGRR
Area Forecast Discussion National Weather Service Grand Rapids MI 316 PM EDT Thu May 22 2025
KEY MESSAGES
- Dry and cool for the holiday weekend
- Slow warming trend next week, chance of rain mid week
DISCUSSION
316 PM EDT Thu May 22 2025
- Dry and cool for the holiday weekend
Radar shows the last of the rain moving southeastward across the eastern cwa; we should be dry tonight.
The surface low will move over Quebec tonight, but the upper low will remain in some form for the next few days. A large area of high pressure will move in behind the surface low and provide dry, but cool conditions throughout the holiday weekend.
Latest visible loop shows an expansive cloud shield surrounding the upper low and we're likely to see a good deal of cloud over the eastern cwa tonight. Clearing is evident over the western half of the cwa currently and that clearing will make some inroads eastward tonight, but likely won't make it all the way through.
The clouds, though, will likely prevent frost from developing over the northeast cwa tonight, but that might not be the case Friday night.
We expect more clearing Friday and Friday night which, under high pressure, will help temperatures fall into the mid 30s across the northeast cwa. Given very low dewpoints, we likely won't see enough frost develop to merit a headline, but we'll keep an eye on it.
Highs tomorrow will only reach the mid 50s. Temperature swill finally reach the lower 60s Saturday,mid 60s Sunday, and upper 60s Monday. Dewpoints in the mid 40s will make for comfortable conditions.
- Slow warming trend next week, chance of rain mid week
The next chance of rain really doesn't arrive until Tuesday afternoon as a southern Plains low moves in this direction; high pressure over Lake Superior will keep system south of the Great Lakes. Rising heights ahead of the low will keep the slow warming trend going. Highs in the upper 60s are expected Tuesday and Wednesday and lower to mid 70s Thursday.
AVIATION /18Z TAFS THROUGH 18Z FRIDAY/
Issued at 151 PM EDT Thu May 22 2025
Lingering MVFR ceilings to move off at JXN and LAN over the next few hours
Some lingering showers should move off as well
with VFR conditions setting up after the showers come to an end.
MARINE
Issued at 316 PM EDT Thu May 22 2025
Wind and waves will begin to diminish this evening and fall below advisory criteria overnight as low pressure over Ontario drifts east. The current advisory and corresponding beach hazards statement runs through 06z which looks good at this point.
GRR WATCHES/WARNINGS/ADVISORIES
MI...Beach Hazards Statement until 2 AM EDT Friday for MIZ037-043-050- 056-064-071.
MARINE...Small Craft Advisory until 2 AM EDT Friday for LMZ844>849.
Area Forecast Discussion National Weather Service Grand Rapids MI 316 PM EDT Thu May 22 2025
KEY MESSAGES
- Dry and cool for the holiday weekend
- Slow warming trend next week, chance of rain mid week
DISCUSSION
316 PM EDT Thu May 22 2025
- Dry and cool for the holiday weekend
Radar shows the last of the rain moving southeastward across the eastern cwa; we should be dry tonight.
The surface low will move over Quebec tonight, but the upper low will remain in some form for the next few days. A large area of high pressure will move in behind the surface low and provide dry, but cool conditions throughout the holiday weekend.
Latest visible loop shows an expansive cloud shield surrounding the upper low and we're likely to see a good deal of cloud over the eastern cwa tonight. Clearing is evident over the western half of the cwa currently and that clearing will make some inroads eastward tonight, but likely won't make it all the way through.
The clouds, though, will likely prevent frost from developing over the northeast cwa tonight, but that might not be the case Friday night.
We expect more clearing Friday and Friday night which, under high pressure, will help temperatures fall into the mid 30s across the northeast cwa. Given very low dewpoints, we likely won't see enough frost develop to merit a headline, but we'll keep an eye on it.
Highs tomorrow will only reach the mid 50s. Temperature swill finally reach the lower 60s Saturday,mid 60s Sunday, and upper 60s Monday. Dewpoints in the mid 40s will make for comfortable conditions.
- Slow warming trend next week, chance of rain mid week
The next chance of rain really doesn't arrive until Tuesday afternoon as a southern Plains low moves in this direction; high pressure over Lake Superior will keep system south of the Great Lakes. Rising heights ahead of the low will keep the slow warming trend going. Highs in the upper 60s are expected Tuesday and Wednesday and lower to mid 70s Thursday.
AVIATION /18Z TAFS THROUGH 18Z FRIDAY/
Issued at 151 PM EDT Thu May 22 2025
Lingering MVFR ceilings to move off at JXN and LAN over the next few hours
Some lingering showers should move off as well
with VFR conditions setting up after the showers come to an end.
MARINE
Issued at 316 PM EDT Thu May 22 2025
Wind and waves will begin to diminish this evening and fall below advisory criteria overnight as low pressure over Ontario drifts east. The current advisory and corresponding beach hazards statement runs through 06z which looks good at this point.
GRR WATCHES/WARNINGS/ADVISORIES
MI...Beach Hazards Statement until 2 AM EDT Friday for MIZ037-043-050- 056-064-071.
MARINE...Small Craft Advisory until 2 AM EDT Friday for LMZ844>849.
| Stations | Dist | Age | Wind | Air | Water | Waves | inHg | DewPt |
| SVNM4 - South Haven, MI | 1 mi | 18 min | WNW 23G | 47°F | ||||
| HLNM4 - 9087031 - Holland, MI | 26 mi | 48 min | NW 25G | 48°F | 55°F | 29.92 | 42°F | |
| 45026 - St. Joseph, MI | 34 mi | 38 min | N 19G | 49°F | 49°F | 6 ft | 30.01 | 40°F |
| 45029 | 35 mi | 38 min | W 21G | 47°F | 46°F | 5 ft | 42°F | |
| 45214 | 44 mi | 68 min | 42°F | 3 ft |
Wind History for Holland, MI
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Link to 1 hour of 5 minute data for KLWA
Terminal Aerodrome Forecast (TAF) for KLWA
Wind History Graph: LWA
(wind in knots)
GEOS Local Image of great lakes
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Grand Rapids/Muskegon, MI,
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