Marine forecast
Casco Bay, ME
- current wind
- 11 kt N
- Gusts
- 14 kt
- Seas
- 5.9 ft
- Period
- 6 sec
- Air
- 46°F
Observed Tue 3:00 PM | ANZ153
- Gusts now
- 14 kt
- Seas now
- 5.9 ft · 6 sec
- Air
- 46°F
- Water
- 56°F
- 72-hr peak
- 17 kt
In brief
At 3:00 pm EDT on Oct 13, 2026, NDBC station CASM1 (Portland, ME, 14 miles away) measured wind from the N at 11 kt, gusting to 14 kt; buoy 44098 measured seas of 5.9 ft. The NWS forecast for Casco Bay, ME issued at 2:38 pm EDT on Oct 13, 2026 reads, for this afternoon: “E winds 10 to 15 kt, increasing to 15 to 20 kt late. Seas 2 to 4 ft.” A Small Craft Advisory is in effect until Wed 2:00 AM.
Source: National Weather Service Gray ME forecast; NDBC observations
Wind forecast · ktPeak 17 kt
Marine advisory
Small Craft Advisory in effect for Casco Bay until Wed 2:00 AM.
Full text of this small craft advisory
* WHAT...Southeast winds 10 to 20 kt with gusts up to 30 kt and seas 1 to 4 ft expected. * WHERE...Penobscot Bay and Casco Bay. * WHEN...From 5 PM this afternoon to 2 AM EDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft.
NWS marine forecast
| Period | Forecast |
|---|---|
| This Afternoon | E winds 10 to 15 kt, increasing to 15 to 20 kt late. Seas 2 to 4 ft. Rain. Patchy fog early. Patchy fog late. Vsby 1 to 3 NM, decreasing to 1 NM or less late. |
| Tonight | SE winds 15 to 20 kt, becoming SW 5 to 10 kt after midnight. Seas 2 to 4 ft. Rain, mainly in the evening. Areas of fog. Vsby 1 NM or less. |
| Wed | W winds 5 to 10 kt. Seas 2 to 4 ft. Areas of fog in the morning with vsby 1 NM or less. |
| Wed Night | NW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 25 kt after midnight. Seas 2 to 4 ft. |
| Thu | NW winds 10 to 15 kt, diminishing to 5 to 10 kt in the afternoon. Seas 2 to 3 ft. |
| Thu Night | N winds around 5 kt, becoming E after midnight. Seas around 2 ft in the evening, then 1 foot or less. |
| Fri | S winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Showers. |
| Fri Night | W winds 15 to 20 kt, increasing to 20 to 25 kt after midnight. Gusts up to 35 kt. Seas 2 to 4 ft. Showers, mainly in the evening. |
| Sat | NW winds 25 to 30 kt with gusts up to 40 kt. Seas 2 to 4 ft. |
| Sat Night | NW winds 20 to 25 kt with gusts up to 40 kt, becoming W 15 to 20 kt with gusts up to 25 kt after midnight. Seas 2 to 4 ft. |
Issued Tue 2:38 PM by Gray ME (product CWFGYX).
Recent buoy conditions
| Time | Wind | Gust | Seas | Water |
|---|---|---|---|---|
| Tue 3:00 PM | 11 kt N | 14 kt | — | 56°F |
| Tue 2:54 PM | 12 kt NNE | 15 kt | — | 56°F |
| Tue 1:54 PM | 4 kt E | 8 kt | — | 56°F |
| Tue 12:54 PM | 12 kt NE | 13 kt | — | 56°F |
| Tue 11:54 AM | 9 kt NE | 11 kt | — | 56°F |
| Tue 10:54 AM | 12 kt NE | 15 kt | — | 56°F |
| Tue 9:54 AM | 11 kt NE | 14 kt | — | 56°F |
| Tue 8:54 AM | 12 kt NE | 14 kt | — | 56°F |
| Tue 7:54 AM | 13 kt NE | 14 kt | — | 56°F |
| Tue 6:54 AM | 9 kt NE | 11 kt | — | 56°F |
| Tue 5:54 AM | 12 kt NE | 15 kt | — | 56°F |
| Tue 4:54 AM | 10 kt NE | 14 kt | — | 56°F |
Observed Tue 3:00 PM at NDBC buoy CASM1 (Portland, ME), 14.1 miles away. Seas from buoy 44098 (Jeffrey's Ledge, NH (160)), 69.0 miles away, at Tue 3:00 PM.
Frequently asked questions
What is the marine forecast for Casco Bay today?
This Afternoon: E winds 10 to 15 kt, increasing to 15 to 20 kt late. Seas 2 to 4 ft. Rain. Patchy fog early. Patchy fog late. Vsby 1 to 3 NM, decreasing to 1 NM or less late.
Is there a small craft advisory for Casco Bay?
Yes — small craft advisory in effect until Wed 2:00 AM.
How high are the waves at Casco Bay right now?
Seas are running 5.9 ft at a 6-second period, measured at NDBC buoy CASM1 Tue 3:00 PM, 14.1 miles from this zone.
What is the water temperature at Casco Bay?
The nearest buoy read 56°F (13°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 ANZ153, issued by Gray ME, 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 CWFGYX, issued Tue 2:38 PM. Observations: NOAA National Data Buoy Center station CASM1, 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.