Quick Answer
A fishing forecast combines the solunar table (major and minor feeding periods tied to the moon’s position overhead and underfoot), the moon phase (new and full moons rate highest), weather (a falling or stable barometer before a front fishes well; the day after a cold front fishes poorly), water temperature (each species has a preferred range), tides and current for saltwater (moving water, especially the hours around a tide change, beats slack) and the light transitions at dawn and dusk. The best windows are when several line up: a major solunar period at dawn on a moving tide ahead of a front, for example. Forecasts improve your odds; they do not replace reading the water in front of you.
Key Takeaways
- Solunar majors (moon overhead/underfoot, ~2 hours) and minors (moonrise/moonset, ~1 hour) are the forecast’s core; fish them when they coincide with dawn, dusk or a tide change.
- New and full moons are rated best; the strongest tides also fall around them.
- Barometer: steady or slowly falling pressure before a front is prime; a sharp rise after a front slows fishing for a day or two.
- Water temperature matters more than air temperature; bass are most active 60–75°F, trout 45–65°F, walleye 55–68°F.
- Saltwater: fish moving water, the last of the incoming and first of the outgoing, and structure where current concentrates bait.
- Overcast, light wind and a ripple on the surface beat bright, flat calm for most species.
- Apps: Fishbrain, FishAngler, Tides Near Me, Windy, In-Fisherman Solunar Calendar, Farmers’ Almanac fishing calendar.
Fishing forecasts promise to tell you when the fish will bite, and the honest answer is that they identify the hours when the odds are better, not a guarantee. The underlying factors are real: feeding activity rises around the moon’s transits, tide movement puts bait and predators in motion, and weather changes trigger or shut down bites. This guide explains each factor, how the popular forecasts calculate their ratings, how to combine them for a given day, and which apps and calendars are worth using. The biology is general; local knowledge refines it.
Forecast Factors and What They Mean
| Factor | Favorable | Unfavorable | Notes |
|---|---|---|---|
| Solunar period | Major (moon overhead or underfoot, ~2 hrs); minor (moonrise/set, ~1 hr) | Hours between periods | Strongest when a period overlaps dawn, dusk or a tide change |
| Moon phase | New and full moon (and 2–3 days around them) | Quarter moons | Also drives the largest tides |
| Barometric pressure | Steady 29.9–30.1 inHg or slowly falling ahead of a front | Rapid rise after a front; very high, clear-sky pressure | Post-front bluebird days are the classic tough day |
| Weather | Overcast, light rain, approaching front, light wind | Cold front passage, bright calm, strong wind | Wind pushes bait and warms or cools banks |
| Water temperature | Species-specific optimum range | Rapid drops; extremes | Spring warming and fall cooling trigger feeding |
| Tide (saltwater) | Moving water; last 2 hrs of incoming, first 2 of outgoing; spring tides | Slack tide; neap tides (weaker movement) | Current position matters more than tide height |
| Time of day | Dawn and dusk; night in summer | Midday in bright sun and heat | Light level changes trigger feeding |
| Season | Pre-spawn, fall feeding | Mid-summer heat, deep winter (species-dependent) | Overrides daily factors |
Solunar Tables Explained
The solunar theory, published by John Alden Knight in 1926, holds that fish and game feed most actively when the moon is directly overhead (upper transit) or directly below (lower transit), producing two major periods of about two hours each day, and less actively at moonrise and moonset, the two minor periods of about an hour. Tables and apps calculate these for your location and rate the day on a scale (often one to four or a percentage) that also weighs the moon phase. Controlled studies are mixed, but the practical observation of generations of anglers is that bites cluster around these periods more often than chance, and the periods are a sound way to choose which hours to fish when time is limited. The effect is strongest when a major coincides with dawn or dusk or, in saltwater, with a tide change.
Moon Phase
Forecasts rate new and full moons highest, for two reasons: feeding activity around the transits is thought to be stronger, and in saltwater the new and full moons produce spring tides, the largest tidal range and strongest currents of the month, which move the most bait. Quarter moons bring neap tides with weaker movement. In freshwater the moon’s effect is smaller, though many anglers find the days around the full moon productive in summer, especially at night, and the new moon productive for daytime bites.
Weather and Barometric Pressure
Fish sense pressure changes through their swim bladders. The reliable patterns: a slowly falling barometer ahead of a front, with clouds building and wind rising, is often the best fishing of the week as fish feed before the change; the front’s passage with rain and wind can be excellent until it becomes unfishable; the day or two after, with a rapidly rising barometer, clear skies and a north wind, is the classic poor day, with fish tight to cover and slow to bite; and stable pressure for several days produces consistent, if not spectacular, fishing. Overcast skies extend the dawn and dusk bite through the day. Wind blowing into a shoreline stacks bait and warms the water in spring, and a ripple hides the angler.
Water Temperature and Season
Water temperature governs metabolism, and each species has a range where it feeds hardest: largemouth bass about 60–75°F, smallmouth 55–70°F, walleye 55–68°F, trout 45–65°F, crappie 55–70°F, catfish 70–85°F, striped bass 55–68°F, redfish and speckled trout 65–80°F. Spring warming toward those ranges triggers pre-spawn feeding, and fall cooling triggers the heaviest feeding of the year for most freshwater species. In summer heat and winter cold, fish feed in shorter windows (dawn, dusk and night in summer; midday warmth in winter). A thermometer on the line tells you more than the air forecast does.
Tides and Current for Saltwater
In salt, moving water is the forecast. Current carries bait to predators waiting at points, cuts, bridge pilings, jetties and channel edges, so the productive windows are the hours when the tide is running, especially the last two hours of the incoming and the first two of the outgoing, and the few minutes of change when fish reposition. Slack tide is usually dead. Spring tides around the new and full moon move the most water; neap tides the least. Tide height matters for access (flats fish on a rising tide; inlets on the outgoing), but current speed matters for the bite. Tide apps give the times; the solunar overlay shows when a transit lines up with a tide change, which is the strongest combination in inshore fishing.
Putting It Together for a Day
- Check the season and water temperature: is the species in a feeding period at all?
- Check the weather trend: fishing before a front or in stable weather beats the day after a front.
- Find the solunar majors and minors for your location.
- For saltwater, find the tide changes and the moving-water windows.
- Fish the hours where a solunar period overlaps dawn, dusk or a tide change, and stay flexible: if fish are feeding outside the forecast window, the fish are right.
Apps and Calendars
- Fishbrain: forecasts with solunar, weather and catch data from users; freshwater and salt.
- FishAngler and Fishing Points: solunar, weather, tides and maps.
- Tides Near Me / Tide Charts / NOAA Tides & Currents: tide and current predictions.
- Windy and Windfinder: wind, pressure and marine weather.
- In-Fisherman Solunar Calendar and Bassmaster Fishing Times: classic daily tables.
- Farmers’ Almanac and Old Farmer’s Almanac fishing calendars: long-range moon-based best-days lists.
- Fishweather, BuoyWeather: offshore marine forecasts.
Frequently Asked Questions
What is the best time of day to fish?
Dawn and dusk for most species in most seasons, extended by overcast skies, plus any solunar major period and, in saltwater, the hours of moving water around a tide change. Night fishing is productive in summer heat.
Do solunar tables really work?
They identify periods when feeding activity tends to be higher, and many anglers find bites cluster around them, especially when a major coincides with dawn, dusk or a tide change. They improve odds rather than guarantee a bite.
Is fishing better before or after a cold front?
Before. A slowly falling barometer ahead of a front often produces the best fishing of the week; the day or two after, with rising pressure and clear skies, is usually slow.
What moon phase is best for fishing?
New and full moons are rated best, and in saltwater they bring the strongest tides and currents. Quarter moons with weaker neap tides are rated lowest.
What is the best fishing forecast app?
Fishbrain and FishAngler combine solunar, weather and tides with maps; Tides Near Me or NOAA for tides; Windy for marine weather; and In-Fisherman or Bassmaster solunar calendars for classic daily tables.
Conclusion
A fishing forecast is a way of stacking the odds: season and water temperature decide whether fish are feeding at all, weather trend decides whether today is a good day, and solunar periods, light changes and tides decide which hours to be on the water. Fish the overlaps, carry a thermometer, watch the barometer, and treat the forecast as a starting point that the fish are free to contradict.
