Marine Weather and Tide Forecast for Monroe, WI

SHORT TERM
Issued 104 PM CDT Wed Oct 14 2026

Tonight through Thursday night:

High pressure continues to works its way across the area this afternoon and evening. expect northeasterly winds to urn more easterly this evening and tonight. As the high pressure pushes further east expect the easterly onshore winds to persist into Thursday. Meanwhile across the central Plains expect low pressure to lift northwest through the day Thursday and overtake another weak low from the north. Pair this with upper-level trough and mid-level vorticity, will be enough to support increased precip chances through the day Thursday. With the low tracking to our south and easterly wind, expect this to be more of a widespread steady rain on the cool side of the system. Have trended a bit slower, but with extra moisture off Lake Michigan will see the environment saturate through the mid to late morning with higher chances through the afternoon. Overall rainfall amounts will remain between a tenth to up to three quarters of an inch with the higher total trending toward the WI/IL border along with the higher PWAT values approaching 1.5 inches. As for thunderstorm, cannot rule out a few isolated rumbles of thunder, but given the track and cooler environment not expecting much instability to build into our neck of the woods.

By Thursday night, expect the low to track into the Eastern Great Lakes with a cooler push of air and northwesterly winds on the backside of the departing system. While dry air will try to push in, some lingering moisture on the backside paired with a delayed upper- level trough passage will be enough to keep rain chances around overnight into Friday morning.

As for temps expect highs in the mid to upper 50s and lows in the 40s for the second half of the week.

Wagner

LONG TERM
Issued 104 PM CDT Wed Oct 14 2026

Friday through Wednesday:

The upper-level trough continues to migrate its way through the Great Lakes on Friday. Given the slower departure of the trough and wrap around showers on the backside of the departing surface low, cannot rule out some light precip lingering through day break Friday morning. Otherwise, Friday is trending more fall like with blustery, northerly winds and colder temps.
Daytime highs only looking to top off in the 50s. However, as winds decouple and high builds to our west, overnight lows are looking to dip toward freezing into Saturday morning. While we may not be a fan of the colder temps, this is not unexpected and is typical for this time of year for southern WI as the average first 32F day for fall is around 10/21 for MKE and around 10/11 for MSN. Thus frost/freeze headlines are favored at this time for at least Friday night into early Saturday morning with slightly warmer and more frosty conditions for Sunday.

Otherwise, the rest of the weekend is trending drier as upper- level ridge builds across the region as the surface high pressure works its way east across the Midwest. Temps look to remain near normal through the day Saturday, but as the high slides further east and southerly winds and WAA increases, temps are progged to gradually warm each day back to above normal Sunday through the start of next week.

Wagner

AVIATION
Issued 104 PM CDT Wed Oct 14 2026

Clouds are expected to continue through the period and bounce between MVFR and VFR for the remainder of the afternoon. Then looking to lift as high pressure tracks across the region tonight before dropping back down to MVFR and even IFR levels through Thursday morning as low pressure and increase shower chances spread in through the day. Northeasterly winds this afternoon will turn easterly and remain fairly light tonight, but easterly winds are then expected to pick up through Thursday morning a bit. Then should turn more northwesterly and increase more later Thursday night into Friday as the low treks east.

Wagner

MARINE
Issued 104 PM CDT Wed Oct 14 2026

Northeasterly winds this afternoon will gradually turn more easterly tonight into Thursday as high pressure around 30.3 inches tracks across the region. The stronger winds are expected across the southern half of the lake during this time. Then two areas of low pressure are progged to merge over the Great Lakes Region into a single low pressure for Thursday and deepens to around 29.5 inches as it shifts into the eastern Great Lakes later Thursday through Friday. Expect a northwesterly wind shift to ramp up and increase to gales and nearing storm force at times on the backside of the departing low pressure while a strong high pressure around 30.7 inches builds to the west. Thus will maintain a Gale Watch for all the open waters of Lake Michigan Friday morning into Friday night.

Wagner

MKX WATCHES/WARNINGS/ADVISORIES
WI...None.
LM
Small Craft Advisory
LMZ644-LMZ645-LMZ646...7 PM Wednesday to 4 PM Thursday.

Gale Watch...LMZ643-LMZ644-LMZ645-LMZ646...10 AM Friday to 10 PM Friday.

Small Craft Advisory
LMZ643
7 AM Thursday to 4 PM Thursday.

Gale Watch...LMZ080-LMZ261-LMZ362-LMZ364-LMZ366-LMZ563-LMZ565- LMZ567-LMZ669-LMZ671-LMZ673-LMZ675-LMZ777-LMZ779-LMZ868- LMZ870-LMZ872-LMZ874-LMZ876-LMZ878...10 AM Friday to 1 AM Saturday.