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Forecast
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© 2026·AI-powered bite forecast
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United Kingdom / Hampshire / River Itchen

Bite forecast: River Itchen

  • length 48 km
  • Flows into River Leam
Loading map…

Best fishing days for the next week

  1. WednesdaySeptember 2weather-based forecast
    54/100medium activity

    Cloudy: 15–20 °C

  2. SundaySeptember 6weather-based forecast
    52/100medium activity

    Partly cloudy: 16–24 °C

  3. ThursdaySeptember 3weather-based forecast
    51/100medium activity

    Partly cloudy: 18–25 °C

River Itchen (Hampshire) — one of the area's fishing spots. About 48 km long. Flows into River Leam. Close by — Winchester, Romsey and Alton. A smart bite calendar — moon phase, atmospheric pressure, and weather combined into an hourly fish-activity forecast for the coming days.

Nearby towns

  • Winchester0.2 mi
  • Romsey6 mi
  • Alton10 mi

Catches

Recorded 10 catches here. Most commonly caught: Brown trout, Grayling, Chub. Peak season: April–November.

  • Grayling
    River Itchen
    14 °C18 mph
    Nov 19, 2023, 3:13 PM
  • Brown trout
    River Itchen
    25 °C2 mph
    Aug 13, 2020, 2:05 PM
  • Chub
    River Itchen
    21 °C7 mph
    Jul 30, 2020, 1:02 PM
  • Brown trout
    River Itchen
    21 °C11 mph
    Jul 16, 2020, 3:50 PM
  • Carp
    River Itchen
    14 °C4 mph
    Apr 18, 2020, 8:12 PM
  • Grayling
    River Itchen
    16 °C11 mph
    Sep 23, 2019, 11:30 AM
  • Brown trout
    River Itchen
    16 °C9 mph
    Sep 29, 2017, 4:47 PM
  • Brown trout
    River Itchen
    16 °C9 mph
    Sep 29, 2017, 4:47 PM

Nearby rivers

  • Navigation Diversion2 mi
  • Lady Lake3 mi
  • Swift's Lake3 mi
  • Monk's Brook4 mi
  • Monks Brook6 mi
  • Lower Itchen Breach6 mi
  • Hamble7 mi
  • Tanners Brook7 mi
  • Tadburn Lake7 mi

Nearby water bodies

  • LakeGreat Pond2 mi
  • LakeFisher's Pond2 mi
  • LakeKingham Lake4 mi
  • LakeBeach Lake4 mi
  • LakeConcorde Lake4 mi
  • LakeKornwestheim Lake4 mi
  • LakeShrubbery Pond5 mi
  • LakePark Pond5 mi
  • PondCrampmoor Fish Farm5 mi
  • LakeAvington Lake6 mi
Loading map…

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?
DaceEuropean eelGraylingPikeBarbelRuffeZanderPerchWhitefishAtlantic salmonBreamCarpRainbow troutBrown troutWels catfishIdeRoachBleakChubCrucian carpWhite breamRuddTench

Atlantic salmon

6/10 · Fair

Hourly activity

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

The bite is strong — fish are active. Pressure is rising — activity tends to be more subdued.

Peak bite hours

Best time — 06:00–08:00 (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: salmon spoon or salmon fly.

Gear

No special gear needed — seasonal clothing will do.

Summary

Worth going — it's a productive day.

How this forecast is calculated

Why this forecast

The computed water temperature is around 17 °C — warmer than the 4–14 °C comfort range for Atlantic salmon: in the heat it drops deeper and feeds less often.

Computed water temperature by month; the green band is the 4–14 °C comfort rangecomfort 4–14 °C17 °C
JFMAMJJASOND

Atlantic salmon 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 Atlantic salmon feeds0:0012:0024:00

Pressure is dropping 2 hPa over the day — fish are usually more active ahead of a weather change.

Pressure through the day, 2 hPa change
00:00 · 102123:00 · 1019 hPa

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 Atlantic salmon here.

JFMAMJJASOND

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

2 SepWednesday, September 2
+19°

Cloudy · feels like +17°

Low / high
+14°…+20°
Precipitation
0.0 mm
Wind
14 mph SW
Cloud cover
100%
Humidity
70%
Pressure
1020 hPa
00:00+16°—1 mphsouth wind, 1 mph90%99%
01:00+15°—4 mphsouth wind, 4 mph92%97%
02:00+15°—4 mphsouth wind, 4 mph90%100%
03:00+15°—4 mphsouthwest wind, 4 mph87%100%
04:00+14°—4 mphsouthwest wind, 4 mph92%0%
05:00+15°—5 mphsouthwest wind, 5 mph92%72%
06:00+15°—6 mphsouthwest wind, 6 mph91%98%
07:00+15°—4 mphsouth wind, 4 mph92%98%
08:00+17°—7 mphsouthwest wind, 7 mph88%86%
09:00+18°—10 mphsouthwest wind, 10 mph79%67%
10:00+19°—12 mphsouthwest wind, 12 mph73%73%
11:00+19°—12 mphsouthwest wind, 12 mph69%100%
12:00+19°—14 mphsouthwest wind, 14 mph70%100%
13:00+19°—16 mphsouthwest wind, 16 mph71%100%
14:00+19°—15 mphsouthwest wind, 15 mph76%100%
15:00+19°—15 mphsouthwest wind, 15 mph79%100%
16:00+20°—15 mphsouthwest wind, 15 mph78%99%
17:00+20°—14 mphsouthwest wind, 14 mph76%72%
18:00+20°—13 mphsouthwest wind, 13 mph77%89%
19:00+20°—11 mphsouthwest wind, 11 mph79%68%
20:00+19°—10 mphsouthwest wind, 10 mph83%87%
21:00+19°—9 mphsouthwest wind, 9 mph86%100%
22:00+18°—10 mphsouthwest wind, 10 mph89%84%
23:00+18°—9 mphsouthwest wind, 9 mph91%70%
+20°+17°+14°
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
06:19
Sunset
19:48
Day length
13 h 29 min
Sunshine hours
5 h 14 min
UV index
2
low
Moon
Waning gibbous
Moonrise
21:18
Moonset
13:01

The day is 4 min shorter than yesterday.

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

Solunar feeding periods

+13% in the windowWednesday, September 2
Feeding windows on the day scale, local time0:0012:0024:00
Major periodsMinor periods
  • Major03:47–05:47Moon overhead
  • Minor12:31–13:31Moonset
  • Major16:15–18:15Moon underfoot
  • Minor20:48–21:48Moonrise

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?

BiteGuide·From anglers’ reports

What actually worked on this water

Based on 10 verified catchesPeriod: 2014–2023

This is a summary of anglers' reports, not a proven cause of the bite: conditions lining up does not mean they drove it.

By fish species

vertical axis — number of catches

035
52111
Brown troutGraylingAtlantic salmonCarpChub
By fish species
ValueCatchesShare
Brown trout550%
Grayling220%
Atlantic salmon110%
Carp110%
Chub110%

By month

vertical axis — number of catches

024
12142
AprJulAugSepNov
By month
ValueCatchesShare
Apr110%
Jul220%
Aug110%
Sep440%
Nov220%

By time of day

vertical axis — number of catches

012
1122121
10121415161721
By time of day
ValueCatchesShare
10:00110%
12:00110%
14:00220%
15:00220%
16:00110%
17:00220%
21:00110%

Air temperature, °C

vertical axis — number of catches

024
3421
10152025
Air temperature, °C
ValueCatchesShare
10–14 °C330%
15–19 °C440%
20–24 °C220%
25–29 °C110%

Pressure, mmHg

vertical axis — number of catches

024
1441
750755760765
Pressure, mmHg
ValueCatchesShare
750–754 mmHg110%
755–759 mmHg440%
760–764 mmHg440%
765–769 mmHg110%

Wind direction

vertical axis — number of catches

023
121132
NESESSWWNW
Wind direction
ValueCatchesShare
NE110%
SE220%
S110%
SW110%
W330%
NW220%

Wind speed, mph

vertical axis — number of catches

036
1261
04918
Wind speed, mph
ValueCatchesShare
0–2 mph110%
4–7 mph220%
9–11 mph660%
18–20 mph110%