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Main Bay (North Dakota) — a spot well known among anglers. About 68.7 km² in area. A coastal water: the bite here is modelled for the sea, not for a river or a lake. A smart bite calendar — moon phase, atmospheric pressure, and weather combined into an hourly fish-activity forecast for the coming days.
Other nearby waters
The shoreline is moderately indented: bays and points alternate with even stretches. The islands add structure: drop-offs around their perimeter and channels between them and the bank. Larger than 9 of the 10 waters nearby.
The longest fetch is 7 mi along the north-west — south-east axis: wind along it builds a wave on the open water and pushes silt and food towards the lee bank.
North Dakota: 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chinook salmon | slow | slow |
Wednesday, October 21
Look for structure — reefs, flats, channel edges; work them slowly near the bottom.
Main Bay — Wednesday, October 21
The bite is weak — fish are sluggish. Pressure is rising — activity tends to be more subdued. Peak 08:00–10:00 and 18:00–20:00.
The computed water temperature is around 53 °F — inside the 43–59 °F comfort range for Chinook salmon, so baseline activity is high.
Chinook salmon works the twilight: the peaks are pinned to sunrise and sunset — their times are in the sun-and-moon card above.
Pressure is flat: it moves no more than 0.03 inHg over the day, so the weather isn't shifting today's bite.
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 a slow season for Chinook salmon: the best months fall at another time of year.
These are the same values the bite curve above was computed from. How the forecast works
Clear · feels like +46°
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 fieldG1 geomagnetic storm, Kp 4.7
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?| fair |
| peak |
| peak |
| peak |
| active |
| fair |
| slow |
| slow |
| slow |
Look for structure — reefs, flats, channel edges; work them slowly near the bottom.
Main Bay — Wednesday, October 21
The bite is weak — fish are sluggish. Pressure is rising — activity tends to be more subdued. Peak 08:00–10:00 and 18:00–20:00.