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Bay Merrimack Inlet (Massachusetts) — a popular fishing spot. About 34 ha in area. Close by — Newburyport and Amesbury. This is a sea water — its bite forecast is a marine one, computed apart from rivers and lakes. A smart bite calendar — moon phase, atmospheric pressure, and weather combined into an hourly fish-activity forecast for the coming days.
Nearest towns and cities
The shoreline is moderately indented: bays and points alternate with even stretches. Larger than 9 of the 13 waters nearby.
Other nearby places to fish
Other nearby waters
Massachusetts: the months when each species peaks and when it goes quiet. The current month is outlined.
| Fish | January | February | March | April | May | June | July | August | September | October | November | December |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Striped bass | slow | fair | active | peak | peak | active | active | active | peak | active | fair | slow |
| Bluefish | slow | slow | fair | active | active | active | active | peak | peak | active | fair | slow |
| Flounder | slow | slow | fair | active | peak | active | active | peak | peak | active | fair | slow |
| Atlantic salmon | slow | slow | fair | active | peak | peak | active | active | active | fair | slow | slow |
| Brown trout | slow | slow | fair | peak | peak | peak | active | active | fair | slow | slow | slow |
Wednesday, October 21
Look for structure — reefs, flats, channel edges; work them slowly near the bottom.
Merrimack Inlet — Wednesday, October 21
The bite is moderate — fish feed in short bursts. Pressure is dropping — this usually boosts the bite. Peak 07:00–08:00 and 17:00–19:00.
The computed water temperature is around 56 °F — inside the 39–57 °F comfort range for Atlantic salmon, so baseline activity is high.
Atlantic salmon works the twilight: the peaks are pinned to sunrise and sunset — their times are in the sun-and-moon card above.
Pressure is dropping 0.09 inHg over the day — fish are usually more active ahead of a weather change.
One more input — the moon's feeding windows: within their hours the score sits higher than across the rest of the day. The window times are in the “Solunar feeding periods” card below.
October is an average month for Atlantic salmon here.
These are the same values the bite curve above was computed from. How the forecast works
| 00:00 | 01:00 | 02:00 | 03:00 | 04:00 | 05:00 | 06:00 | 07:00 | 08:00 | 09:00 | 10:00 | 11:00 | 12:00 | 13:00 | 14:00 | 15:00 | 16:00 | 17:00 | 18:00 | 19:00 | 20:00 | 21:00 | 22:00 | 23:00 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| -4.2 ft | -4.6 ft | -4.5 ft | -3.7 ft | -2.0 ft | -0.0 ft | 1.2 ft | 1.8 ft | 1.9 ft | 1.4 ft | 0.1 ft | -1.7 ft | -3.1 ft | -3.6 ft | -3.7 ft | -3.3 ft | -1.9 ft | 0.0 ft | 1.6 ft | 2.3 ft | 2.4 ft | 2.0 ft | 0.8 ft | -1.2 ft |
Open-Meteo tide model, grid point 11 mi away
Open-Meteo Marine model, grid cell 11.0 mi from the waterbody. Values are daily means.
Cloudy · feels like +42°
The day is 3 min shorter than yesterday.
Sunshine hours count direct sun only — cloud cover cuts it, so it is shorter than daylight.
Geomagnetic fieldquiet, Kp 3.7
Kp index — NOAA forecast. Not part of the bite score: catches show no link between geomagnetic storms and the bite.
The windows are set by the moon's transit and rise, and the forecast above already accounts for them: within these hours the bite score sits higher than across the rest of the day, while the day's overall level still comes from the catch-calibrated model.
What are solunar periods?Look for structure — reefs, flats, channel edges; work them slowly near the bottom.
Merrimack Inlet — Wednesday, October 21
The bite is moderate — fish feed in short bursts. Pressure is dropping — this usually boosts the bite. Peak 07:00–08:00 and 17:00–19:00.
Measured river conditions are available for Merrimack Inlet: current gauge height, streamflow, and water temperature when reported by the source.
USGS gauge MERRIMACK RIVER AT NEWBURYPORT, MA, 3 mi away · measured 2026-10-21 08:00 · data source · provisional data, subject to revision