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Where to fish

  • Forecast
  • Catches

Mine

  • Favorites
Forecast
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© 2026·AI-powered bite forecast
0.1.0+2161 · b4069346

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United States / Florida / Nassau River

Bite forecast: Nassau River

  • length 44 mi
Loading map…

Best fishing days for the next week

  1. WednesdaySeptember 2weather-based forecast
    30/100medium activity

    Cloudy: 75–88 °F

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Nearby rivers

  • Plummer Creek1 mi
  • Alligator Creek2 mi
  • Thomas Creek4 mi

Nearby water bodies

  • LakeRiver Glen Lake0.9 mi
  • PondCrested Heron Pond0.9 mi
  • PondWinding River Pond1 mi
  • PondMisty Lake Pond1 mi
  • PondWaterbug Pond3 mi
  • PondWhistling Duck Pond4 mi
  • LakeBaine Lake5 mi

Nassau River (Florida) — a popular fishing spot. About 72 km long. This page shows an hourly bite forecast for today and the week ahead; the algorithm factors in the weather, atmospheric pressure, and the moon phase.

Catches

Recorded 3 catches here. Most commonly caught: Red drum. Peak season: June–July.

  • Red drum
    Nassau River
    Jul 13, 2018
  • Red drum
    Nassau River
    Jul 12, 2018
  • Red drum
    Nassau River
    Jun 28, 2018
ThursdaySeptember 3weather-based forecast
28/100low activity

Cloudy: 75–84 °F

  • SaturdaySeptember 5weather-based forecast
    28/100low activity

    Drizzle: 75–88 °F

  • Bite calendar

    Wednesday, September 2

    Aug 31 – Sep 6
    Mon
    Tue
    Wed
    Thu
    Fri
    Sat
    Sun
    Bite activity:highmediumlowslow
    Based on:weatherseasonal
    What is a bite calendar?
    Black crappieStriped bassWhite bassWhite crappieLargemouth bassBlue catfishBluegillCarpChannel catfishFlathead catfishGrass carpSpotted bass

    Black crappie

    6/10 · Fair

    Hourly activity

    0:006:0012:0018:0023:00
    Bite activity:highmediumlow

    The bite is moderate — fish feed in short bursts. Weather is steady, with no sharp swings — fish behave predictably.

    Peak bite hours

    Best time — 07:00–09:00 (dawn bite) and 19:00–21:00 (dusk bite).

    Tactics

    Work the cover — snags, weed edges, hole entrances; retrieve the lure with pauses.

    Lures

    In clear water, natural colors work best: small jig or minnow bait.

    Gear

    It's a hot day — a hat, sunglasses, and plenty of water are a must.

    Summary

    An average day — best chances during peak windows.

    How this forecast is calculated

    Why this forecast

    The computed water temperature is around 80 °F — warmer than the 57–75 °F comfort range for Black crappie: in the heat it drops deeper and feeds less often.

    Computed water temperature by month; the green band is the 57–75 °F comfort rangecomfort 57–75 °F80 °F
    JFMAMJJASOND

    Black crappie works the twilight: the peaks are pinned to sunrise and sunset — their times are in the sun-and-moon card above.

    The day: daylight hours and when Black crappie feeds0:0012:0024:00

    Pressure is flat: it moves no more than 0.03 inHg over the day, so the weather isn't shifting today's bite.

    Pressure through the day, 0.03 inHg change
    00:00 · 30.0423:00 · 30.02 inHg

    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.

    Feeding windows on the day scale0:0012:0024:00

    September is an active season for Black crappie here.

    JFMAMJJASOND

    These are the same values the bite curve above was computed from. How the forecast works

    2 SepWednesday, September 2
    +85°

    Cloudy · feels like +95°

    Low / high
    +76°…+88°
    Precipitation
    0.00 in
    Wind
    7 mph NNE
    Cloud cover
    95%
    Humidity
    74%
    Pressure
    30.09 inHg
    00:00+78°—1 mphnorth wind, 1 mph94%44%
    01:00+78°—2 mphnorth wind, 2 mph94%0%
    02:00+77°—3 mphnorth wind, 3 mph95%68%
    03:00+77°—3 mphnorth wind, 3 mph95%100%
    04:00+77°—3 mphnorth wind, 3 mph95%100%
    05:00+77°—3 mphnorth wind, 3 mph95%85%
    06:00+76°—4 mphnorth wind, 4 mph94%26%
    07:00+76°—4 mphnortheast wind, 4 mph93%100%
    08:00+76°—4 mphnortheast wind, 4 mph93%100%
    09:00+78°—5 mphnortheast wind, 5 mph93%100%
    10:00+80°—5 mphnorth wind, 5 mph90%66%
    11:00+83°—7 mphnorth wind, 7 mph79%75%
    12:00+85°—7 mphnortheast wind, 7 mph74%95%
    13:00+85°—7 mphnortheast wind, 7 mph73%32%
    14:00+87°—6 mphnortheast wind, 6 mph70%37%
    15:00+87°—5 mphnortheast wind, 5 mph68%100%
    16:00+88°—4 mphnorth wind, 4 mph66%100%
    17:00+88°—5 mphnortheast wind, 5 mph65%100%
    18:00+85°—8 mphnortheast wind, 8 mph77%100%
    19:00+79°—7 mphnortheast wind, 7 mph87%100%
    20:00+78°—4 mphnorth wind, 4 mph88%100%
    21:00+77°—2 mpheast wind, 2 mph90%100%
    22:00+77°—3 mpheast wind, 3 mph92%100%
    23:00+76°—3 mpheast wind, 3 mph93%96%
    +88°+82°+76°
    Weather throughout the day
    0:006:0012:0018:0023:00

    Sun and moon

    Wednesday, September 2
    The day: daylight and the hours the moon is above the horizon. Local time0:0012:0024:00
    DaylightMoon above the horizon
    Sunrise
    07:11
    Sunset
    19:55
    Day length
    12 h 44 min
    Sunshine hours
    6 h 43 min
    UV index
    6
    high
    Moon
    Waning gibbous
    Moonrise
    23:01
    Moonset
    12:36

    The day is 2 min shorter than yesterday.

    Sunshine hours count direct sun only — cloud cover cuts it, so it is shorter than daylight.

    Solunar feeding periods

    +14% in the windowWednesday, September 2
    Feeding windows on the day scale, local time0:0012:0024:00
    Major periodsMinor periods
    • Major04:23–06:23Moon overhead
    • Minor12:06–13:06Moonset
    • Major16:51–18:51Moon underfoot
    • Minor22:31–23:31Moonrise

    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?

    Measured river conditions are available for Nassau River: current gauge height, streamflow, and water temperature when reported by the source.

    Water

    Gauge height
    9.41 ft
    Streamflow
    15,400 ft³/s
    Water temp · measured
    83 °F
    In the model
    80 °F

    USGS gauge NASSAU RIVER NEAR TISONIA, FL, 6 mi away · measured 2026-09-02 08:30 · data source · provisional data, subject to revision