Marine Weather and Tide Forecast for Grand Beach, MI
 | Sunrise 5:12 AM Sunset 8:22 PM Moonrise 2:41 AM Moonset 6:01 PM |
Marine Forecasts
NOTE: Zones updated 4/16/2026. Some zones changed. Use Edit if needed.
LMZ080 Lake Michigan From Michigan City In To St. Joseph Mi 5 Nm Offshore To Mid Lake- Lake Michigan From Sheboygan To Port Washington Wi 5 Nm Offshore To Mid Lake- Lake Michigan From Port Washington To North Point Light Wi 5 Nm Offshore To Mid Lake- Lake Michigan From North Point Light To Wind Point Wi 5 Nm Offshore To Mid Lake- Lake Michigan From Wind Point Wi To Winthrop Harbor Il 5 Nm Offshore To Mid Lake- Lake Michigan From Winthrop Harbor To Wilmette Harbor Il 5 Nm Offshore To Mid Lake- Lake Michigan From Wilmette Harbor Il To Michigan City In 5 Nm Offshore To Mid Lake- Lake Michigan From Whitehall To Pentwater Mi 5 Nm Offshore To Mid Lake- Lake Michigan From Grand Haven To Whitehall Mi 5 Nm Offshore To Mid Lake- Lake Michigan From Holland To Grand Haven Mi 5 Nm Offshore To Mid Lake- Lake Michigan From South Haven To Holland Mi 5 Nm Offshore To Mid Lake- Lake Michigan From St. Joseph To South Haven Mi 5 Nm Offshore To Mid Lake- 304 Pm Cdt Fri Jun 12 2026
sheboygan wi to pentwater mi south - .
Tonight - Southwest winds 10 to 20 kt. Waves 2 to 4 ft.
Saturday - Southwest winds 10 to 20 kt increasing to 30 kt, then diminishing to 15 to 25 kt late. Chance of showers and Thunderstorms in the afternoon. Waves 4 to 6 ft occasionally to 8 ft.
Saturday night - Southwest winds 10 to 20 kt veering to northwest. Showers likely with a chance of Thunderstorms in the evening, then chance of showers overnight. Waves 3 to 5 ft subsiding to 2 to 4 ft.
Sunday - Northwest winds 15 to 25 kt. Waves 3 to 5 ft.
Sunday night - West winds 10 to 20 kt. Waves 1 to 3 ft.
Monday - West winds 10 to 20 kt. Waves 1 to 3 ft.
Monday night - Southwest winds 10 to 20 kt. Waves 1 to 3 ft.
Tuesday - Southwest winds 10 to 20 kt becoming south to 30 kt. Waves 3 to 5 ft building to 4 to 6 ft occasionally to 8 ft.
Wednesday - Southwest winds 10 to 20 kt becoming south 15 to 25 kt. Chance of Thunderstorms. Waves 2 to 4 ft building to 3 to 5 ft.
sheboygan wi to pentwater mi south - .
LMZ005
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7 Day Forecast for Marine Location Near Grand Beach, MI
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Area Discussion for Northern Indiana, IN
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FXUS63 KIWX 122253 AFDIWX
Area Forecast Discussion National Weather Service Northern Indiana 653 PM EDT Fri Jun 12 2026
KEY MESSAGES
- Drier and cooler weather is in place for today and the first part of Saturday with highs in the 70s and 80s.
- A marginal risk for severe weather edges into areas west of US-69 for Saturday night. The main risk is damaging wind, but hail and heavy rain are possible. The risk is expected to wane farther east of I-69.
- The middle of next week looks cooler than normal and unsettled with chances for showers and storms increasing Tuesday and through the remainder of the week.
DISCUSSION
Issued at 300 PM EDT Fri Jun 12 2026
Much drier airmass has moved into the area, surface dew points about 20 degrees less with values in the mid-50s today and mostly clear skies with a zonal flow aloft. Also, a bit cooler with highs topping out in the mid 70s today. This comfortable weather will spill over into tomorrow albeit slightly warmer.
High temperatures for Saturday will be in 80s with just a slight increase in humidities, dew points in the 60s.
Attention then turns to another cold front pushing into the area from the west late Saturday which will bring increased chances for showers and thunderstorms into the area as it pushes eastward through the area. At this time, SPC does have our area under a slight risk for severe weather mainly west of the I-69 corridor. The timing of the arrival of the cold front will be late in the evening once again but there is some uncertainty on the exact timing which looks to be from 9 PM to 11 PM EDT.
Forecasted environment has SB CAPE values above 1500 J/kg and SR Helicity around 100 m2/s2 but the limiting factor here will be the available shear with values around 20-25 kts. PWats around 1.5 inches will also be available. Main threats would be gusty winds, hail, and heavy downpours with this event.
Troughing then sets up over the Great Lakes region in the wake of the frontal passage through most of next week. This will keep temperatures slightly cooler than average with high temperatures mainly in the 70s and also periods of showers and thunderstorms beginning on Tuesday.
AVIATION /00Z TAFS THROUGH 00Z SUNDAY/
Issued at 652 PM EDT Fri Jun 12 2026
Drier and cooler airmass now in place and mainly VFR conditions expected through this TAF period outside of MVFR cigs around 3 kft after 00z through 12z Sat. Southwesterly winds with gusts around 20 kts.
IWX WATCHES/WARNINGS/ADVISORIES
IN...None.
OH...None.
MI...None.
MARINE...None.
Area Forecast Discussion National Weather Service Northern Indiana 653 PM EDT Fri Jun 12 2026
KEY MESSAGES
- Drier and cooler weather is in place for today and the first part of Saturday with highs in the 70s and 80s.
- A marginal risk for severe weather edges into areas west of US-69 for Saturday night. The main risk is damaging wind, but hail and heavy rain are possible. The risk is expected to wane farther east of I-69.
- The middle of next week looks cooler than normal and unsettled with chances for showers and storms increasing Tuesday and through the remainder of the week.
DISCUSSION
Issued at 300 PM EDT Fri Jun 12 2026
Much drier airmass has moved into the area, surface dew points about 20 degrees less with values in the mid-50s today and mostly clear skies with a zonal flow aloft. Also, a bit cooler with highs topping out in the mid 70s today. This comfortable weather will spill over into tomorrow albeit slightly warmer.
High temperatures for Saturday will be in 80s with just a slight increase in humidities, dew points in the 60s.
Attention then turns to another cold front pushing into the area from the west late Saturday which will bring increased chances for showers and thunderstorms into the area as it pushes eastward through the area. At this time, SPC does have our area under a slight risk for severe weather mainly west of the I-69 corridor. The timing of the arrival of the cold front will be late in the evening once again but there is some uncertainty on the exact timing which looks to be from 9 PM to 11 PM EDT.
Forecasted environment has SB CAPE values above 1500 J/kg and SR Helicity around 100 m2/s2 but the limiting factor here will be the available shear with values around 20-25 kts. PWats around 1.5 inches will also be available. Main threats would be gusty winds, hail, and heavy downpours with this event.
Troughing then sets up over the Great Lakes region in the wake of the frontal passage through most of next week. This will keep temperatures slightly cooler than average with high temperatures mainly in the 70s and also periods of showers and thunderstorms beginning on Tuesday.
AVIATION /00Z TAFS THROUGH 00Z SUNDAY/
Issued at 652 PM EDT Fri Jun 12 2026
Drier and cooler airmass now in place and mainly VFR conditions expected through this TAF period outside of MVFR cigs around 3 kft after 00z through 12z Sat. Southwesterly winds with gusts around 20 kts.
IWX WATCHES/WARNINGS/ADVISORIES
IN...None.
OH...None.
MI...None.
MARINE...None.
| Stations | Dist | Age | Wind | Air | Water | Waves | inHg | DewPt |
| 45170 | 19 mi | 39 min | WSW 7.8G | 68°F | 64°F | 1 ft | 29.30 | 62°F |
| 45026 - St. Joseph, MI | 20 mi | 39 min | SSW 5.8G | 67°F | 1 ft | 29.95 | 61°F | |
| MCYI3 - Michigan City, IN | 21 mi | 39 min | SW 13G | 72°F | 29.89 | 63°F | ||
| BHRI3 - Burns Harbor, IN | 28 mi | 59 min | W 6G | 29.95 | ||||
| 45198 | 31 mi | 29 min | W 12G | 75°F | 62°F | 1 ft | 29.90 | 57°F |
| CHII2 - Chicago, IL | 31 mi | 39 min | W 16G | 78°F | 55°F | |||
| CNII2 | 34 mi | 84 min | W 8G | 79°F | 50°F | |||
| OKSI2 | 34 mi | 99 min | NW 1.9G | 81°F | ||||
| 45174 | 35 mi | 39 min | WNW 9.7G | 71°F | 1 ft | 30.00 | ||
| CMTI2 - 9087044 - Calumet, IL | 35 mi | 51 min | WSW 2.9G | 29.94 | ||||
| FSTI2 | 35 mi | 99 min | 80°F | |||||
| 45168 | 44 mi | 39 min | S 7.8G | 67°F | 65°F | 1 ft | 29.91 | 61°F |
| 45214 | 45 mi | 69 min | 58°F | 1 ft | ||||
| SVNM4 - South Haven, MI | 46 mi | 49 min | S 9.9G | 69°F | ||||
| 45186 | 48 mi | 29 min | WSW 5.8G | 70°F | 55°F | 0 ft | 29.94 | |
| WHRI2 - Waukegan Harbor, IL | 49 mi | 99 min | SW 6 |
Wind History for Calumet Harbor, IL
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Link to 5 hour of 5 minute data for KMGC
Terminal Aerodrome Forecast (TAF) for KMGC
Wind History Graph: MGC
(wind in knots)
GEOS Local Image of great lakes
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Northern Indiana, IN,
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