Marine Weather and Tide Forecast for St. Joseph, MI
 | Sunrise 6:31 AM Sunset 4:38 PM Moonrise 4:45 AM Moonset 4:00 PM |
Marine Forecasts
NOTE: Zones updated 4/16/2026. Some zones changed. Use Edit if needed.
LMZ878 Expires:202611071015;;393435 Fzus63 Kmkx 070315 Glflm
open lake forecast for lake michigan national weather service milwaukee/sullivan wi 915 pm cst Fri nov 6 2026
for waters beyond five nautical miles of shore on lake michigan.
waves are provided as a range of significant wave heights, which is the average of the highest 1/3 of the wave, along with the average height of the highest 10% of the waves which will occasionally be encountered.
Synopsis -
northerly gale force winds have ended over lake michigan. Winds will continue to gradually ease overnight into Saturday as the northern axis of high pressure of 30.3 moves overhead overnight and moves south into the ohio river valley through Saturday.
westerly winds will then increase Saturday night into Sunday between the high departing to the southeast and a trough of low pressure approaching from the northwest. Breezy winds will then persist at times early next week as another shortwave moves through by Monday night.
lmz080-669-671-673-675-777-779-870-872-874-876-878-071015- 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- 915 pm cst Fri nov 6 2026
sheboygan wi to pentwater mi south - .
Rest of tonight - Northwest winds 15 to 25 kt diminishing to 10 to 20 kt. Slight chance of rain late this evening. Waves 6 to 9 ft occasionally to 12 ft subsiding to 4 to 6 ft occasionally to 8 ft.
Saturday - Northwest winds 10 to 20 kt becoming west. Waves 3 to 5 ft subsiding to 2 to 4 ft.
Saturday night - West winds 10 to 20 kt increasing to 15 to 25 kt. Waves 2 to 4 ft building to 4 to 7 ft occasionally to 9 ft.
Sunday - West winds to 30 kt. Waves 6 to 9 ft occasionally to 12 ft.
Sunday night - Northwest winds 15 to 25 kt diminishing to 10 to 20 kt. Waves 6 to 9 ft occasionally to 12 ft subsiding to 4 to 7 ft occasionally to 9 ft.
Monday - Southwest winds 10 to 20 kt increasing to 15 to 25 kt. Waves 3 to 5 ft building to 4 to 6 ft occasionally to 8 ft.
Monday night - Southwest winds 15 to 25 kt becoming west. Waves 4 to 7 ft occasionally to 9 ft.
Tuesday - West winds 10 to 20 kt. Waves 4 to 6 ft occasionally to 8 ft.
Wednesday - Northwest winds 10 to 20 kt becoming north. Waves 2 to 4 ft.
open lake forecast for lake michigan national weather service milwaukee/sullivan wi 915 pm cst Fri nov 6 2026
for waters beyond five nautical miles of shore on lake michigan.
waves are provided as a range of significant wave heights, which is the average of the highest 1/3 of the wave, along with the average height of the highest 10% of the waves which will occasionally be encountered.
northerly gale force winds have ended over lake michigan. Winds will continue to gradually ease overnight into Saturday as the northern axis of high pressure of 30.3 moves overhead overnight and moves south into the ohio river valley through Saturday.
westerly winds will then increase Saturday night into Sunday between the high departing to the southeast and a trough of low pressure approaching from the northwest. Breezy winds will then persist at times early next week as another shortwave moves through by Monday night.
lmz080-669-671-673-675-777-779-870-872-874-876-878-071015- 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- 915 pm cst Fri nov 6 2026
sheboygan wi to pentwater mi south - .
LMZ800
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7 Day Forecast for Marine Location Near St. Joseph, MI
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Area Discussion for Northern Indiana, IN
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FXUS63 KIWX 062330 AFDIWX
Area Forecast Discussion National Weather Service Northern Indiana 630 PM EST Fri Nov 6 2026
KEY MESSAGES
- Scattered to numerous lake effect rain showers will continue through tonight, mainly for areas west of Interstate 69 in northern IN and southwest MI.
- Seasonably cool conditions continue into Saturday night before a slow warming trends commences, with highs in the 60s by Tuesday.
- Cooler temperatures return for the second half of the week.
- No significant precipitation expected Saturday through Friday.
DISCUSSION
Issued at 110 PM EST Fri Nov 6 2026
Well defined upper low centered near Saginaw Bay (Lower MI) with several weak disturbances/troughs rotating around the feature as it drifts slowly ESE reaching western NY by 12Z Sat. Weakly convergent flow along the eastern shores is keeping the main area of rain showers from South Haven to South Bend. Instability and favorable fetch peak into mid afternoon with combination of lowering inversion heights, departing low and core of coldest air shifting east should lead to a downward trend into tonight. Kept some lingering pops into the overnight before ending. Temperatures tonight will drop into the low to mid 30s, coldest outside of any lake effect cloud cover.
Low level WAA will commence on Saturday, but bulk of greatest increase will occur in the afternoon, limiting impacts on afternoon highs to the lower 50s. After one more cold night in the lower 30s, high temps will begin to rebound a few degrees each day into Tuesday with a return to above normal levels (low to mid 60s) by Tuesday.
A semi zonal upper flow will be interrupted by a northern stream wave, with a front pushing into the area by Wednesday. The trough will deepen into the second half of the week with additional waves move through the flow. The main impact appears to be a return to near or somewhat below normal temperatures to end the work week.
Some lake effect shower chances could arrive Thu/Fri, but overall flow right now may favor portions of far NW Indiana into NE Illinois.
AVIATION /00Z TAFS THROUGH 00Z SUNDAY/
Issued at 630 PM EST Fri Nov 6 2026
Lake effect rain showers and stratus will continue through the late evening as cool N/NW flow persists. Expect a general trend toward MVFR ceilings overnight as the boundary layer slowly cools but pockets of VFR will remain possible through the evening.
Rain ends around 06Z but MVFR ceilings will persist through early Sat afternoon before winds back and dry air advection scatters the low cloud deck.
IWX WATCHES/WARNINGS/ADVISORIES
IN...None.
OH...None.
MI...None.
MARINE...Small Craft Advisory until 4 PM EST Saturday for LMZ043-046.
Area Forecast Discussion National Weather Service Northern Indiana 630 PM EST Fri Nov 6 2026
KEY MESSAGES
- Scattered to numerous lake effect rain showers will continue through tonight, mainly for areas west of Interstate 69 in northern IN and southwest MI.
- Seasonably cool conditions continue into Saturday night before a slow warming trends commences, with highs in the 60s by Tuesday.
- Cooler temperatures return for the second half of the week.
- No significant precipitation expected Saturday through Friday.
DISCUSSION
Issued at 110 PM EST Fri Nov 6 2026
Well defined upper low centered near Saginaw Bay (Lower MI) with several weak disturbances/troughs rotating around the feature as it drifts slowly ESE reaching western NY by 12Z Sat. Weakly convergent flow along the eastern shores is keeping the main area of rain showers from South Haven to South Bend. Instability and favorable fetch peak into mid afternoon with combination of lowering inversion heights, departing low and core of coldest air shifting east should lead to a downward trend into tonight. Kept some lingering pops into the overnight before ending. Temperatures tonight will drop into the low to mid 30s, coldest outside of any lake effect cloud cover.
Low level WAA will commence on Saturday, but bulk of greatest increase will occur in the afternoon, limiting impacts on afternoon highs to the lower 50s. After one more cold night in the lower 30s, high temps will begin to rebound a few degrees each day into Tuesday with a return to above normal levels (low to mid 60s) by Tuesday.
A semi zonal upper flow will be interrupted by a northern stream wave, with a front pushing into the area by Wednesday. The trough will deepen into the second half of the week with additional waves move through the flow. The main impact appears to be a return to near or somewhat below normal temperatures to end the work week.
Some lake effect shower chances could arrive Thu/Fri, but overall flow right now may favor portions of far NW Indiana into NE Illinois.
AVIATION /00Z TAFS THROUGH 00Z SUNDAY/
Issued at 630 PM EST Fri Nov 6 2026
Lake effect rain showers and stratus will continue through the late evening as cool N/NW flow persists. Expect a general trend toward MVFR ceilings overnight as the boundary layer slowly cools but pockets of VFR will remain possible through the evening.
Rain ends around 06Z but MVFR ceilings will persist through early Sat afternoon before winds back and dry air advection scatters the low cloud deck.
IWX WATCHES/WARNINGS/ADVISORIES
IN...None.
OH...None.
MI...None.
MARINE...Small Craft Advisory until 4 PM EST Saturday for LMZ043-046.
| Stations | Dist | Age | Wind | Air | Water | Waves | inHg | DewPt |
| 45214 | 16 mi | 70 min | 58°F | 6 ft | ||||
| 45168 | 32 mi | 40 min | NW 18G | 50°F | 56°F | 6 ft | 30.15 | 40°F |
| SVNM4 - South Haven, MI | 34 mi | 50 min | NW 23G | 35°F | ||||
| 45026 - St. Joseph, MI | 36 mi | 40 min | NW 14G | 50°F | 55°F | 6 ft | 30.15 | 39°F |
| 45174 | 44 mi | 40 min | W 16G | 46°F | 5 ft | 30.19 | ||
| HLNM4 - 9087031 - Holland, MI | 44 mi | 52 min | N 15G | 30.12 | ||||
| 45029 | 47 mi | 40 min | NNW 18G | 47°F | 55°F | 5 ft | 30.07 | 41°F |
| WHRI2 - Waukegan Harbor, IL | 47 mi | 100 min | WSW 2.9 |
Wind History for Holland, MI
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Link to 5 hour of 5 minute data for KBEH
Terminal Aerodrome Forecast (TAF) for KBEH
Wind History Graph: BEH
(wind in knots)
GEOS Local Image of great lakes
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