Marine forecast
Patapsco River including Baltimore Harbor, MD
- current wind
- 5 kt SW
- Gusts
- 7 kt
- Seas
- 0.7 ft
- Air
- 82°F
- Water
- 76°F
Observed Tue 2:54 PM | ANZ538
- Gusts now
- 7 kt
- Seas now
- 0.7 ft
- Air
- 82°F
- Water
- 76°F
- 72-hr peak
- 17 kt
In brief
At 2:54 pm EDT on Oct 13, 2026, NDBC station BLTM2 (Baltimore, MD, 1 miles away) measured wind from the SW at 5 kt, gusting to 7 kt; buoy 44063 measured seas of 0.7 ft. The NWS forecast for Patapsco River including Baltimore Harbor, MD issued at 2:27 pm EDT on Oct 13, 2026 reads, for this afternoon: “S winds 5 to 10 kt. Waves 1 ft.” A Marine Weather Statement is in effect until Tue 5:00 PM.
Source: National Weather Service Baltimore MD/Washington DC forecast; NDBC observations
Wind forecast · ktPeak 17 kt
Seas forecast · ftPeak 1 ft
Marine advisory
Marine Weather Statement in effect for Patapsco River including Baltimore Harbor until Tue 5:00 PM.
Full text of this marine weather statement
Southerly winds may gust up to 20 knots at times through this afternoon across portions of the central and southern Chesapeake Bay. Mariners, especially in small craft, should exercise caution and be prepared for locally higher winds and waves.
NWS marine forecast
| Period | Forecast |
|---|---|
| This Afternoon | S winds 5 to 10 kt. Waves 1 ft. |
| Tonight | SW winds 5 kt. Waves less than 1 ft. |
| Wed | W winds 5 kt. Waves less than 1 ft. |
| Wed Night | NW winds 5 to 10 kt. Waves 1 ft or less. A chance of showers. |
| Thu | NE winds 5 to 10 kt. Waves 1 ft. Showers likely. |
| Thu Night | SE winds 5 to 10 kt. Waves 1 ft. A chance of showers. |
| Fri | SW winds 10 to 15 kt...becoming NW 15 to 20 kt. Waves 1 to 2 ft. A chance of showers in the morning, then showers likely through the night. |
| Sat | NW winds 15 to 20 kt...diminishing to 5 kt after midnight. Waves 1 to 2 ft. |
Issued Tue 2:27 PM by Baltimore MD/Washington DC (product CWFLWX).
Recent buoy conditions
| Time | Wind | Gust | Seas | Water |
|---|---|---|---|---|
| Tue 2:54 PM | 5 kt SW | 7 kt | — | 76°F |
| Tue 1:54 PM | 4 kt S | 7 kt | — | 76°F |
| Tue 12:54 PM | 4 kt SSE | 6 kt | — | 76°F |
| Tue 11:54 AM | 4 kt SSE | 4 kt | — | 76°F |
| Tue 10:54 AM | 3 kt S | 4 kt | — | 76°F |
| Tue 9:54 AM | 2 kt WSW | 3 kt | — | 76°F |
| Tue 8:54 AM | 2 kt WSW | 3 kt | — | 76°F |
| Tue 7:54 AM | 1 kt WSW | 1 kt | — | 76°F |
| Tue 6:54 AM | 0 kt | 1 kt | — | 76°F |
| Tue 5:54 AM | 1 kt SE | 2 kt | — | 76°F |
| Tue 4:54 AM | 3 kt WSW | 3 kt | — | 76°F |
| Tue 3:54 AM | 2 kt SW | 2 kt | — | 76°F |
Observed Tue 2:54 PM at NDBC buoy BLTM2 (Baltimore, MD), 1.3 miles away. Seas from buoy 44063 (Annapolis, MD), 20.8 miles away, at Tue 3:00 PM.
Frequently asked questions
What is the marine forecast for Patapsco River including Baltimore Harbor today?
This Afternoon: S winds 5 to 10 kt. Waves 1 ft.
Is there a small craft advisory for Patapsco River including Baltimore Harbor?
Yes — marine weather statement in effect until Tue 5:00 PM.
How high are the waves at Patapsco River including Baltimore Harbor right now?
Seas are running 0.7 ft, measured at NDBC buoy BLTM2 Tue 2:54 PM, 1.3 miles from this zone. The forecast peaks at 1.0 ft Tue 3 PM.
What is the water temperature at Patapsco River including Baltimore Harbor?
The nearest buoy read 76°F (24°C) at Tue 2:54 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 ANZ538, issued by Baltimore MD/Washington DC, 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 CWFLWX, issued Tue 2:27 PM. Observations: NOAA National Data Buoy Center station BLTM2, read Tue 2:54 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.