Marine Weather and Tide Forecast for La Porte, IN
 | Sunrise 5:13 AM Sunset 8:25 PM Moonrise 2:52 PM Moonset 1:02 AM |
Marine Forecasts
NOTE: Zones updated 4/16/2026. Some zones changed. Use Edit if needed.
LMZ046 Michigan City In To New Buffalo Mi- 440 Pm Edt Tue Jun 23 2026
Tonight - North winds around 10 knots becoming light and variable this evening, then becoming southeast around 5 knots overnight. Mostly clear. Waves 1 to 2 feet subsiding to around 1 foot.
Wednesday - South winds 10 knots or less becoming southeast. A chance of showers and Thunderstorms in the afternoon. Waves 1 foot or less.
Wednesday night - East winds 5 to 10 knots becoming southwest. Showers likely with a chance of Thunderstorms in the evening, then a chance of showers and Thunderstorms overnight. Waves 1 foot or less.
Thursday - West winds 10 knots or less becoming north. Partly Sunny. Waves 1 foot or less.
winds and waves higher in and near Thunderstorms.
the water temperature at st. Joseph is 51 degrees and at michigan city is 50 degrees.
winds and waves higher in and near Thunderstorms.
the water temperature at st. Joseph is 51 degrees and at michigan city is 50 degrees.
LMZ005
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7 Day Forecast for Marine Location Near La Porte, IN
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Area Discussion for Northern Indiana, IN
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FXUS63 KIWX 231801 AFDIWX
Area Forecast Discussion National Weather Service Northern Indiana 201 PM EDT Tue Jun 23 2026
KEY MESSAGES
- There is a moderate swim risk for southeast Lake Michigan beaches this afternoon. Breaking waves and currents are expected.
- The next chance for showers and storms arrives late Wednesday afternoon into Wednesday night. Severe weather is not expected at this time.
- Additional chances (30-70%) for showers and embedded storms late Thursday night into Friday, best chances south of US-24.
- Hot weather settles in by early next week with highs in the 90s.
DISCUSSION
Issued at 200 PM EDT Tue Jun 23 2026
High pressure in between upper level shortwaves will continue to provide pleasant weather conditions into tonight and Wednesday morning. A somewhat slow moving cold front then drops southeast through the area late Wednesday afternoon into Thursday morning, trailing a mid level shortwave tracking east through the northern Great Lakes. Weak forcing and lacking moisture return suggest isolated to scattered coverage with any shower/storm activity along the front, best chances west of I-69 late Wednesday afternoon/evening where an isolated stronger storm cannot be ruled out given favorable deep layer shear magnitudes. Renewed convection expected along the boundary Thursday afternoon, though the bulk of available model guidance has the front south-southeast of the area by this time with mainly dry/seasonable conditions locally by this time.
The aforementioned frontal boundary likely stalls over the Ohio River Valley Thursday night through Saturday under flattened quasi- zonal flow. Guidance continues to point toward a rather healthy convective system tracking east along this boundary later Thursday night into Friday, potentially clipping mainly southern portions of the forecast area with a period of rain and embedded thunder. Mainly dry and trending warmer/muggy otherwise Sunday into early next week as an upper level ridge builds northward into the Great Lakes region. Peak PM heat indices may near 100F by Monday-Tuesday.
AVIATION /18Z TAFS THROUGH 18Z WEDNESDAY/
Issued at 142 PM EDT Tue Jun 23 2026
VFR conditions are expected during the period at both terminals, with light winds. KFWA could have a period of BR tonight (2-5SM) with the light winds and somewhat clear skies (depends on thickness/coverage of high clouds). For now, given low confidence and conflicted model guidance, left out of the TAF. Otherwise, northwest winds become light and variable overnight, then strengthen slightly out of the southwest on Wednesday.
IWX WATCHES/WARNINGS/ADVISORIES
IN...None.
OH...None.
MI...None.
MARINE...None.
Area Forecast Discussion National Weather Service Northern Indiana 201 PM EDT Tue Jun 23 2026
KEY MESSAGES
- There is a moderate swim risk for southeast Lake Michigan beaches this afternoon. Breaking waves and currents are expected.
- The next chance for showers and storms arrives late Wednesday afternoon into Wednesday night. Severe weather is not expected at this time.
- Additional chances (30-70%) for showers and embedded storms late Thursday night into Friday, best chances south of US-24.
- Hot weather settles in by early next week with highs in the 90s.
DISCUSSION
Issued at 200 PM EDT Tue Jun 23 2026
High pressure in between upper level shortwaves will continue to provide pleasant weather conditions into tonight and Wednesday morning. A somewhat slow moving cold front then drops southeast through the area late Wednesday afternoon into Thursday morning, trailing a mid level shortwave tracking east through the northern Great Lakes. Weak forcing and lacking moisture return suggest isolated to scattered coverage with any shower/storm activity along the front, best chances west of I-69 late Wednesday afternoon/evening where an isolated stronger storm cannot be ruled out given favorable deep layer shear magnitudes. Renewed convection expected along the boundary Thursday afternoon, though the bulk of available model guidance has the front south-southeast of the area by this time with mainly dry/seasonable conditions locally by this time.
The aforementioned frontal boundary likely stalls over the Ohio River Valley Thursday night through Saturday under flattened quasi- zonal flow. Guidance continues to point toward a rather healthy convective system tracking east along this boundary later Thursday night into Friday, potentially clipping mainly southern portions of the forecast area with a period of rain and embedded thunder. Mainly dry and trending warmer/muggy otherwise Sunday into early next week as an upper level ridge builds northward into the Great Lakes region. Peak PM heat indices may near 100F by Monday-Tuesday.
AVIATION /18Z TAFS THROUGH 18Z WEDNESDAY/
Issued at 142 PM EDT Tue Jun 23 2026
VFR conditions are expected during the period at both terminals, with light winds. KFWA could have a period of BR tonight (2-5SM) with the light winds and somewhat clear skies (depends on thickness/coverage of high clouds). For now, given low confidence and conflicted model guidance, left out of the TAF. Otherwise, northwest winds become light and variable overnight, then strengthen slightly out of the southwest on Wednesday.
IWX WATCHES/WARNINGS/ADVISORIES
IN...None.
OH...None.
MI...None.
MARINE...None.
| Stations | Dist | Age | Wind | Air | Water | Waves | inHg | DewPt |
| MCYI3 - Michigan City, IN | 14 mi | 31 min | NE 6G | 60°F | 30.16 | 60°F | ||
| 45170 | 18 mi | 41 min | ENE 5.8G | 60°F | 61°F | 2 ft | 29.54 | 56°F |
| BHRI3 - Burns Harbor, IN | 23 mi | 41 min | NE 2.9G | 30.20 | ||||
| 45026 - St. Joseph, MI | 28 mi | 41 min | N 5.8G | 60°F | 58°F | 2 ft | 30.20 | 53°F |
| CMTI2 - 9087044 - Calumet, IL | 45 mi | 51 min | NE 5.1G | 63°F | 30.18 | 55°F |
Wind History for Calumet Harbor, IL
toggle option: (graph/table)
| Airport | Dist | Age | Wind kt | Vis | Sky | Weather | Air | DewPt | RH | inHg |
| KPPO La Porte Municipal Airport US | 2 sm | 26 min | N 10 | 10 sm | Clear | 68°F | 52°F | 56% | 30.17 | |
| KMGC Michigan City Municipal Airport US | 10 sm | 6 min | N 06 | 10 sm | Clear | 64°F | 50°F | 60% | 30.18 | |
| KOXI Starke County Airport US | 18 sm | 26 min | N 11 | 10 sm | Clear | 70°F | 52°F | 53% | 30.16 | |
| KVPZ Porter County Municipal Airport US | 18 sm | 25 min | var 06 | 10 sm | Clear | 68°F | 46°F | 46% | 30.18 | |
| KSBN South Bend International Airport US | 22 sm | 27 min | NNW 12 | 10 sm | Clear | 68°F | 48°F | 49% | 30.16 |
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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