Marine forecast
Mexico Bay NY to the St. Lawrence River
- current wind
- 4 kt ESE
- Gusts
- 7 kt
- Seas
- 1.0 ft
- Period
- 3 sec
- Air
- 51°F
Observed Tue 3:00 PM | LOZ045
- Gusts now
- 7 kt
- Seas now
- 1.0 ft · 3 sec
- Air
- 51°F
- Water
- 58°F
- 72-hr peak
- 19 kt
In brief
At 3:00 pm EDT on Oct 13, 2026, NDBC station CAVN6 (Cape Vincent, NY, 13 miles away) measured wind from the ESE at 4 kt, gusting to 7 kt; buoy 45135 measured seas of 1.0 ft. The NWS forecast for Mexico Bay NY to the St. Lawrence River issued at 12:18 pm EDT on Oct 13, 2026 reads, for this afternoon: “South winds 5 to 15 knots. Showers with a chance of thunderstorms.”
Source: National Weather Service Buffalo NY forecast; NDBC observations
Wind forecast · ktPeak 19 kt
Seas forecast · ftPeak 2 ft
NWS marine forecast
| Period | Forecast |
|---|---|
| This Afternoon | South winds 5 to 15 knots. Showers with a chance of thunderstorms. Waves 1 foot or less. |
| Tonight | South winds 10 to 15 knots becoming west 15 to 20 knots. Showers likely with a chance of thunderstorms in the evening. Waves 1 to 3 feet building to 2 to 4 feet. |
| Wednesday | West winds 10 to 15 knots increasing to 15 to 20 knots. Mostly cloudy. Waves 2 to 4 feet subsiding to 1 to 3 feet. |
| Wednesday Night | Northwest winds 10 to 15 knots becoming north 15 to 20 knots. Mostly cloudy. Waves 1 to 3 feet building to 2 to 4 feet. |
| Thursday | Northeast winds 5 to 15 knots becoming southeast and increasing to 15 to 25 knots. Showers Thursday night. Waves 2 to 4 feet subsiding to 2 feet or less. |
| Friday | South winds 15 to 25 knots becoming northwest and increasing to 35 knot gales. Rain showers. Waves 2 to 4 feet building to 9 to 13 feet. Waves occasionally around 16 feet. |
| Saturday | Northwest winds to 30 knots becoming west and diminishing to 15 to 20 knots. A chance of rain showers during the day. Waves 10 to 13 feet subsiding to 4 to 7 feet. Waves occasionally around 16 feet. Winds and waves higher in and near thunderstorms. The water temperature off Oswego is 61 degrees, and the water temperature off Cape Vincent is 58 degrees. |
Issued Tue 12:18 PM by Buffalo NY (product NSHBUF).
Recent buoy conditions
| Time | Wind | Gust | Seas | Water |
|---|---|---|---|---|
| Tue 3:00 PM | 4 kt ESE | 7 kt | — | 58°F |
| Tue 2:54 PM | 6 kt ESE | 8 kt | — | 58°F |
| Tue 1:54 PM | 10 kt ENE | 14 kt | — | 58°F |
| Tue 12:54 PM | 4 kt S | 8 kt | — | 58°F |
| Tue 11:54 AM | 4 kt SSW | 8 kt | — | 58°F |
| Tue 10:54 AM | 4 kt SSW | 11 kt | — | 58°F |
| Tue 9:54 AM | 6 kt S | 12 kt | — | 58°F |
| Tue 8:54 AM | 0 kt | 1 kt | — | 58°F |
| Tue 7:54 AM | 1 kt ENE | 2 kt | — | 58°F |
| Tue 6:54 AM | 6 kt E | 9 kt | — | 58°F |
| Tue 5:54 AM | 7 kt E | 8 kt | — | 58°F |
| Tue 4:54 AM | 7 kt ENE | 8 kt | — | 58°F |
Observed Tue 3:00 PM at NDBC buoy CAVN6 (Cape Vincent, NY), 13.1 miles away. Seas from buoy 45135 (Prince Edward Pt), 35.1 miles away, at Tue 3:00 PM.
Frequently asked questions
What is the marine forecast for Mexico Bay NY to the St. Lawrence River today?
This Afternoon: South winds 5 to 15 knots. Showers with a chance of thunderstorms. Waves 1 foot or less.
Is there a small craft advisory for Mexico Bay NY to the St. Lawrence River?
No advisories, warnings or watches are in effect for NWS zone LOZ045 as of the last update on this page. Advisories can be issued at any time; check the current bulletin before leaving the dock.
How high are the waves at Mexico Bay NY to the St. Lawrence River right now?
Seas are running 1.0 ft at a 3-second period, measured at NDBC buoy CAVN6 Tue 3:00 PM, 13.1 miles from this zone. The forecast peaks at 2.0 ft Fri 12 PM.
What is the water temperature at Mexico Bay NY to the St. Lawrence River?
The nearest buoy read 58°F (15°C) at Tue 3:00 PM. Sea surface temperature at a single buoy can differ by several degrees from the water at a beach or in a shallow bay nearby.
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 LOZ045, issued by Buffalo NY, 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 NSHBUF, issued Tue 12:18 PM. Observations: NOAA National Data Buoy Center station CAVN6, 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.