Layers

Marine forecasts · Tides · Currents · Learn — or tap Guides at the top.

Base map Map Satellite

Nautical chart NOAA chart (depths & hazards) Chart opacity OpenSeaMap marks

Weather Radar (rain & thunderstorms)

Animated loop — past 2 hours, plus NOAA HRRR forecast for the next 2. Radar: NOAA/NWS via Iowa State Mesonet.

Buoys — live wind & waves

NOAA buoys and towers, refreshed every 10 minutes. Arrow shows where the wind blows to; tap for waves, water and air temperature. Zone forecasts →

Tides & currents NOAA tide & current stations

Zoom in to see stations — tap T for tides, C for currents.

Popular charts

Chart data: NOAA Electronic Navigational Charts (ENC). Zoom in for soundings (depths in feet at chart datum).

BayCharts — Free Chesapeake Bay Nautical & Depth Charts