Marine Forecast
Illustrated map of Grand Lake St Marys

Marine forecast

Geneva-on-the-Lake to Conneaut, OH

current wind
8 kt WSW
Gusts
9 kt
Seas
1.3 ft
Period
4 sec
72-hr peak
31 kt

Observed Tue 3:00 PM | LEZ148

Gusts now
9 kt
Seas now
1.3 ft · 4 sec
72-hr peak
31 kt
Peak seas
9 ft

In brief

At 3:00 pm EDT on Oct 13, 2026, NDBC station ASBO1 (Ashtabula Lighthouse, 1 miles away) measured wind from the WSW at 8 kt, gusting to 9 kt; buoy 45207 measured seas of 1.3 ft. The NWS forecast for Geneva-on-the-Lake to Conneaut, OH issued at 9:43 am EDT on Oct 13, 2026 reads, for rest of today: “South winds 15 to 20 knots becoming southwest. A slight chance of showers and thunderstorms late this morning.” A Small Craft Advisory is in effect until Wed 2:00 AM.

Source: National Weather Service Cleveland OH forecast; NDBC observations

Wind forecast · ktPeak 31 kt

0510152025303540Wed 14Thu 15Fri 160510152025303540Wed 14Thu 15Fri 16
Sustained GustOct 13-16 | EDT

Seas forecast · ftPeak 9 ft

0123456789Wed 14Thu 15Fri 160123456789Wed 14Thu 15Fri 16
Oct 13-16 | EDT

Marine advisory

Small Craft Advisory in effect for Geneva-on-the-Lake to Conneaut until Wed 2:00 AM.

Full text of this small craft advisory

* WHAT...West winds 15 to 25 knots and waves 1 to 4 feet expected. * WHERE...The nearshore waters of Lake Erie from Willowick OH to Ripley NY. * WHEN...Until 2 AM EDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft.

NWS marine forecast

PeriodForecast
Rest Of TodaySouth winds 15 to 20 knots becoming southwest. A slight chance of showers and thunderstorms late this morning. Waves 1 to 3 feet building to 2 to 4 feet.
TonightWest winds 15 to 20 knots becoming northwest and diminishing to 5 to 10 knots. Partly cloudy. Waves 2 to 4 feet building to 3 to 5 feet, then subsiding to 1 to 3 feet. Waves occasionally around 6 feet.
WednesdayNorthwest winds 10 knots or less. A chance of showers. Waves 2 feet or less.
Wednesday NightNorth winds 10 to 15 knots becoming northeast. Mostly cloudy. Waves 1 to 3 feet. Winds and waves higher in and near thunderstorms. See Lake Erie open lakes forecast for Thursday through Saturday. The water temperature off Toledo is 63 degrees, off Cleveland 65 degrees, and off Erie 63 degrees.

Issued Tue 9:43 AM by Cleveland OH (product NSHCLE).

TimeWindGustSeasWater
Tue 3:00 PM 8 kt WSW 9 kt — —
Tue 2:50 PM 8 kt WSW 10 kt — —
Tue 1:50 PM 7 kt WSW 9 kt — —
Tue 12:50 PM 11 kt WSW 12 kt — —
Tue 11:50 AM 7 kt SSW 10 kt — —
Tue 10:50 AM 9 kt SSW 12 kt — —
Tue 9:50 AM 11 kt S 14 kt — —
Tue 8:50 AM 12 kt S 14 kt — —
Tue 7:50 AM 12 kt S 16 kt — —
Tue 6:50 AM 10 kt S 14 kt — —
Tue 5:50 AM 7 kt SSW 9 kt — —
Tue 4:50 AM 8 kt SSW 11 kt — —

Observed Tue 3:00 PM at NDBC buoy ASBO1 (Ashtabula Lighthouse), 1.0 miles away. Seas from buoy 45207 (Mentor Harbor Buoy), 32.9 miles away, at Tue 3:00 PM.

What is the marine forecast for Geneva-on-the-Lake to Conneaut today?

Rest Of Today: South winds 15 to 20 knots becoming southwest. A slight chance of showers and thunderstorms late this morning. Waves 1 to 3 feet building to 2 to 4 feet.

Is there a small craft advisory for Geneva-on-the-Lake to Conneaut?

Yes — small craft advisory in effect until Wed 2:00 AM.

How high are the waves at Geneva-on-the-Lake to Conneaut right now?

Seas are running 1.3 ft at a 4-second period, measured at NDBC buoy ASBO1 Tue 3:00 PM, 1.0 miles from this zone. The forecast peaks at 9.0 ft Fri 3 PM.

What do the wind speeds in knots mean?

One knot is 1.15 mph. The National Weather Service issues a small craft advisory for sustained winds of roughly 22–33 knots or hazardous seas, a gale warning at 34–47 knots, and a storm warning at 48 knots and above. Exact advisory thresholds vary by forecast office and by water body — a bay reaches dangerous chop at a lower wind speed than open ocean.

Where does this forecast come from?

The forecast text is the National Weather Service's own marine bulletin for zone LEZ148, issued by Cleveland OH, reproduced in full. The wind and seas charts are drawn from the NWS gridded forecast for a point inside the zone. Observations come from the nearest reporting NDBC buoy. We are not affiliated with NOAA or the National Weather Service.

Forecast: NOAA/NWS product NSHCLE, issued Tue 9:43 AM. Observations: NOAA National Data Buoy Center station ASBO1, read Tue 3:00 PM. Retrieved Oct 13, 3:42 PM. Conditions offshore change faster than any page can be rebuilt, so check the current NWS bulletin and your own instruments before going out.