Marine Weather and Tide Forecast for Pentwater, MI
April 22, 2025 6:59 PM EDT (22:59 UTC) Change Location
![]() | Sunrise 6:49 AM Sunset 8:37 PM Moonrise 3:26 AM Moonset 1:24 PM |
LMZ848 Whitehall To Pentwater Mi- 405 Pm Edt Tue Apr 22 2025
Through early evening - Southeast winds 10 to 15 knots. Mostly cloudy. Waves 1 foot or less.
Tonight - East winds 5 to 15 knots. Partly cloudy. A slight chance of rain showers in the evening. Waves 1 foot or less.
Wednesday - Southeast winds 5 to 10 knots veering south 5 to 15 knots. Mostly cloudy with a chance of rain showers. Waves 1 foot or less.
Wednesday night - South winds 5 to 10 knots. Partly cloudy with a chance of rain showers and a slight chance of Thunderstorms. Waves 1 foot or less.
Thursday - Northeast winds 5 to 10 knots backing north 10 to 15 knots. Mostly cloudy with a slight chance of rain showers. Waves around 1 foot.
Thursday night - Northeast winds 10 to 15 knots veering east 15 to 20 knots toward daybreak. Mostly cloudy with a chance of rain showers. Waves around 1 foot.
Friday - East winds 15 to 20 knots backing north. Rain showers. Waves 1 to 3 feet building to 2 to 4 feet late in the day.
Saturday - North winds 15 to 20 knots. Mostly Sunny. Waves 2 to 4 feet.
Sunday - Southeast winds 10 to 15 knots veering south. Mostly Sunny. Waves around 1 foot.
LMZ800
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7 Day Forecast for Marine Location Near Pentwater, MI

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Area Discussion for Grand Rapids, MI
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FXUS63 KGRR 221930 AFDGRR
Area Forecast Discussion National Weather Service Grand Rapids MI 330 PM EDT Tue Apr 22 2025
KEY MESSAGES
- Small Chances for Rain Much of This Week
- Dry Weekend then Chance for Showers and Storms Early Next Week
- Near to Above Normal Temperatures the Next 7 days
DISCUSSION
Issued at 308 PM EDT Tue Apr 22 2025
- Small Chances for Rain Much of This Week
We have small chances for showers and storms at times almost each forecast period through Friday. A weak warm front is located in the CWA tonight and on Wednesday. This boundary along with the interaction of a low level jet nearby will provide the chance for some isolated/scattered showers. Given the drier air in place we have have rain showers and no thunder mentioned tonight and Wednesday. Dew point depressions at the surface are around 30 degrees at this point.
Wednesday night into Thursday we have a washing out cold front that moves in from the northwest and then a reestablishing warm front. Chances for rain during these periods are on the order of 20-30 pct.
Better chances for showers and storms will come Thursday night into Friday. The increased rain chances will come from a low moving through the area sliding northeast along the front. We have high chances for precipitation given an upper shortwave moving through in conjunction with surface wave. 70-90 pct chances for rain are in the forecast Friday afternoon.
- Dry Weekend then Chance for Showers and Storms Early Next Week
The weekend looks dry with high pressure driving into the region from the northwest. Better chances for showers and storms return early next week as a cold front approaches from the west. The cold front will be pushed by an upper wave moving through the Northern Plains an Upper Midwest. These storms could be on the stronger side, but there are timing differences at this point given it is 7 days out. As it stands now, Tuesday could be an active day with storms.
- Near to Above Normal Temperatures the Next 7 days
Temperatures through the forecast period will be at or above normal the next 7 days. Normal highs are around 60 and we will push into the 70s for what appears to be 3-4 days. Warmest days look to be Thursday and next Tuesday.
AVIATION /18Z TAFS THROUGH 18Z WEDNESDAY/
Issued at 130 PM EDT Tue Apr 22 2025
Showers and a few storms that were affecting Wisconsin earlier have dried up quite a bit as they have moved toward Southern Lower early this afternoon. What is left of these is mainly a cloud deck around 7-8k ft with maybe a few sprinkles reaching the ground over Lake Michigan that will move overhead this evening. The northern terminals along I-96 will likely see the clouds partially clear out overnight. The southern terminals look to keep the cloud cover and a few sprinkles overnight. The clouds should then move out of there in the morning. Another batch of clouds and possible precipitation will likely come in late Wed, but it will be after this forecast's valid period.
MARINE
Issued at 308 PM EDT Tue Apr 22 2025
No marine concerns the next few days with what appears to be a fairly light wind regime. The wind is up aloft this evening and again tomorrow night with the passage of a couple of low level jets, but given warmer air in place we do not expect these brief upticks in wind to result in a response on the water surface. In fact, the WaveWatch3 is showing waves of 2 feet or less the next 48 hours.
GRR WATCHES/WARNINGS/ADVISORIES
MI...None.
MARINE...None.
Area Forecast Discussion National Weather Service Grand Rapids MI 330 PM EDT Tue Apr 22 2025
KEY MESSAGES
- Small Chances for Rain Much of This Week
- Dry Weekend then Chance for Showers and Storms Early Next Week
- Near to Above Normal Temperatures the Next 7 days
DISCUSSION
Issued at 308 PM EDT Tue Apr 22 2025
- Small Chances for Rain Much of This Week
We have small chances for showers and storms at times almost each forecast period through Friday. A weak warm front is located in the CWA tonight and on Wednesday. This boundary along with the interaction of a low level jet nearby will provide the chance for some isolated/scattered showers. Given the drier air in place we have have rain showers and no thunder mentioned tonight and Wednesday. Dew point depressions at the surface are around 30 degrees at this point.
Wednesday night into Thursday we have a washing out cold front that moves in from the northwest and then a reestablishing warm front. Chances for rain during these periods are on the order of 20-30 pct.
Better chances for showers and storms will come Thursday night into Friday. The increased rain chances will come from a low moving through the area sliding northeast along the front. We have high chances for precipitation given an upper shortwave moving through in conjunction with surface wave. 70-90 pct chances for rain are in the forecast Friday afternoon.
- Dry Weekend then Chance for Showers and Storms Early Next Week
The weekend looks dry with high pressure driving into the region from the northwest. Better chances for showers and storms return early next week as a cold front approaches from the west. The cold front will be pushed by an upper wave moving through the Northern Plains an Upper Midwest. These storms could be on the stronger side, but there are timing differences at this point given it is 7 days out. As it stands now, Tuesday could be an active day with storms.
- Near to Above Normal Temperatures the Next 7 days
Temperatures through the forecast period will be at or above normal the next 7 days. Normal highs are around 60 and we will push into the 70s for what appears to be 3-4 days. Warmest days look to be Thursday and next Tuesday.
AVIATION /18Z TAFS THROUGH 18Z WEDNESDAY/
Issued at 130 PM EDT Tue Apr 22 2025
Showers and a few storms that were affecting Wisconsin earlier have dried up quite a bit as they have moved toward Southern Lower early this afternoon. What is left of these is mainly a cloud deck around 7-8k ft with maybe a few sprinkles reaching the ground over Lake Michigan that will move overhead this evening. The northern terminals along I-96 will likely see the clouds partially clear out overnight. The southern terminals look to keep the cloud cover and a few sprinkles overnight. The clouds should then move out of there in the morning. Another batch of clouds and possible precipitation will likely come in late Wed, but it will be after this forecast's valid period.
MARINE
Issued at 308 PM EDT Tue Apr 22 2025
No marine concerns the next few days with what appears to be a fairly light wind regime. The wind is up aloft this evening and again tomorrow night with the passage of a couple of low level jets, but given warmer air in place we do not expect these brief upticks in wind to result in a response on the water surface. In fact, the WaveWatch3 is showing waves of 2 feet or less the next 48 hours.
GRR WATCHES/WARNINGS/ADVISORIES
MI...None.
MARINE...None.
Stations | Dist | Age | Wind | Air | Water | Waves | inHg | DewPt |
LDTM4 - 9087023 - Ludington, MI | 12 mi | 59 min | WSW 1G | 49°F | 31°F | |||
BSBM4 - Big Sable Point, MI | 20 mi | 79 min | S 7G | 51°F | 30.09 | |||
MEEM4 - Manistee Harbor, MI | 33 mi | 79 min | SW 5.1G | 46°F | ||||
MKGM4 - Muskegon, MI | 38 mi | 39 min | E 5.1G | 53°F | 30.06 | 39°F |
Wind History for Ludington, MI
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Airport Reports
Link to 1 hour of 5 minute data for KLDM
Terminal Aerodrome Forecast (TAF) for KLDM
Wind History Graph: LDM
(wind in knots)GEOS Local Image of GreatLakes
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Grand Rapids/Muskegon, MI,

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