Delaware River (West Branch)
The best month to fish the Delaware River (West Branch) is September. The month to avoid is March. Right now, in September, it is worth going.
- January: 52 out of 100
- February: 63 out of 100
- March: 34 out of 100
- April: 47 out of 100
- May: 91 out of 100
- June: 81 out of 100
- July: 91 out of 100
- August: 92 out of 100
- September: 97 out of 100
- October: 92 out of 100
- November: 40 out of 100
- December: 63 out of 100
GAUGE 01426500 · COLOURED BY SEPTEMBER
Month by month
| MONTH | TYPICAL FLOW | RANGE (P20–P80) | WATER | AIR HIGH | RAIN | SCORE |
|---|---|---|---|---|---|---|
| January | 781 cfs | 478–1,638 | 36.3°F | — | — | 52 |
| February | 686 cfs | 520–995 | 35.5°F | — | — | 63 |
| March | 1,108 cfs | 763–2,264 | 37.5°F | — | — | 34 |
| April | 1,701 cfs | 842–2,456 | 43.6°F | — | — | 47 |
| May | 761 cfs | 479–1,615 | 51.7°F | — | — | 91 |
| June | 629 cfs | 575–1,242 | 52.8°F | — | — | 81 |
| July | 672 cfs | 571–779 | 53.8°F | — | — | 91 |
| August | 678 cfs | 641–961 | 53.4°F | — | — | 92 |
| SeptemberNOW | 707 cfs | 614–935 | 54.8°F | — | — | 97 |
| October | 754 cfs | 654–987 | 54.7°F | — | — | 92 |
| November | 531 cfs | 423–855 | 46.1°F | — | — | 40 |
| December | 763 cfs | 494–1,308 | 37.6°F | — | — | 63 |
WHERE THESE NUMBERS COME FROM
Flow and water temperature are medians of the monthly means reported by USGS gauge 01426500 over 2006-2025. Air temperature and precipitation are ten-year normals from Open-Meteo at this river’s gauge coordinates.
The window is deliberate. USGS’s own full-record statistics for a dammed river reach back before the dam — at Lees Ferry, to 1922, forty-one years before Glen Canyon closed — and describe a river that no longer exists.
Flow is scored against this river’s own fishable band of 678–763 cfs. There is no universal band: 8,000 cfs is low water on a big tailwater and a flood on a spring creek.
Water temperature is a ceiling rather than a weight. Above about 68°F a trout that is fought and released frequently dies anyway, so no month above that line is scored as worth booking, however good its flow.
Regulations, licences and access change without notice and are not reproduced here as fact — check the state agency before you travel. A median describes twenty years; it does not forecast your week. Source: U.S. Geological Survey, National Water Information System.