Great Bay Marine Inc
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Around here
Around Great Bay Marine Inc
- Sea Coast Camping and RV ResortRV park · ★ 4.69.2 mi (opens in a new tab)
- Tidewater CampgroundRV park · ★ 3.512.7 mi (opens in a new tab)
- Hampton Beach State Park CampgroundRV park · ★ 4.515.1 mi (opens in a new tab)
- Black Bear CampgroundRV park · ★ 3.917 mi (opens in a new tab)
- Rusnik CampgroundRV park · ★ 3.918.1 mi (opens in a new tab)
- Beach Rose RV ParkRV park · ★ 4.319 mi (opens in a new tab)
- Great Bay National Wildlife RefugeRecreation area1.9 mi (opens in a new tab)
- Great Bay National Estuarine Research ReserveRecreation area5.2 mi (opens in a new tab)
- Rachel Carson National Wildlife RefugeRecreation area21.6 mi (opens in a new tab)
- Parker River National Wildlife RefugeRecreation area21.9 mi (opens in a new tab)
Data Source: Recreation.gov · Source: USGS GNIS · Public land: USGS PAD-US
Typical flow by month
2002 to 2026
The water at Great Bay Marine Inc typically runs highest in March, at a median 42 cfs, and lowest in September, at 2.5 cfs. The highest flow on record for any single day is 1,170 cfs, in 2006.
Show the numbers
| Month | Typical (cfs) | Usual range (cfs) |
|---|---|---|
| January | 20 | 12 to 37 |
| February | 17 | 9.8 to 33 |
| March | 42 | 27 to 69 |
| April | 37 | 23 to 56 |
| May | 17 | 10 to 34 |
| June | 11 | 5.3 to 23 |
| July | 4.0 | 2.0 to 12 |
| August | 3.2 | 0.9 to 12 |
| September | 2.5 | 0.8 to 8.9 |
| October | 7.2 | 2.2 to 21 |
| November | 17 | 8.3 to 30 |
| December | 25 | 13 to 49 |
Typical is the median of each month’s daily median values, and the usual range runs from the median 25th to the median 75th percentile, across about 24 years of record. Statistics published by the US Geological Survey for Winnicut River at Greenland, near Portsmouth, NH (site 01073785). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Current conditions
Today · Sat
69Maybe/ 100
86% chance of rain · Gusts to 20 kt
RainWaves 2.3 ft61°FRain 86%Wind 9 kt, gusts 20
Waves
1.8 ft @ 6s
Wind
6 kt
Gusts 20 kt
Water
56°F
Air
50°F
Streamflow
26 cfs
Normal (69th)
Water level
4.66 ft
Air quality
14 Good
Portsmouth monitor, 8 km
Tides
Falling
Low 0.4 ft at Sun 5:17 AM
Predicted at Dover Point, under 1 km away.
Get a 2027 tide calendar for this stationForecast from Open-Meteo global models (NOAA & ECMWF). Air quality: New Hampshire Dept. of Environmental Services via EPA AirNow. Preliminary data, not verified. Tide predictions: NOAA CO-OPS, feet above mean lower low water. See full conditions →
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