Susquehanna River
The best month to fish the Susquehanna River is June. The month to avoid is March. Right now, in September, it is worth going.
- January: 71 out of 100
- February: 66 out of 100
- March: 49 out of 100
- April: 50 out of 100
- May: 77 out of 100
- June: 93 out of 100
- July: 88 out of 100
- August: 85 out of 100
- September: 81 out of 100
- October: 66 out of 100
- November: 71 out of 100
- December: 71 out of 100
- Flow is well higher than normal — 24,800 CFS against a typical 8,556 CFS.
LIVE FROM USGS GAUGE 01570500 · EVERYTHING ELSE ON THIS PAGE IS A TWENTY-YEAR NORMAL
GAUGE 01570500 · COLOURED BY SEPTEMBER
Month by month
| MONTH | TYPICAL FLOW | RANGE (P20–P80) | WATER | AIR HIGH | RAIN | SCORE |
|---|---|---|---|---|---|---|
| January | 42,195 cfs | 27,940–58,810 | — | — | — | 71 |
| February | 35,380 cfs | 20,300–63,970 | — | — | — | 66 |
| March | 58,375 cfs | 44,910–74,400 | — | — | — | 49 |
| April | 58,320 cfs | 38,810–79,700 | 54.9°F | — | — | 50 |
| May | 44,750 cfs | 31,950–63,990 | 62.8°F | — | — | 77 |
| June | 22,090 cfs | 14,180–31,010 | 75.1°F | — | — | 93 |
| July | 16,515 cfs | 7,819–33,380 | 82.0°F | — | — | 88 |
| August | 12,755 cfs | 7,262–24,650 | 77.9°F | — | — | 85 |
| SeptemberNOW | 8,556 cfs | 5,086–23,400 | 72.0°F | — | — | 81 |
| October | 12,840 cfs | 8,690–33,480 | 60.6°F | — | — | 66 |
| November | 25,605 cfs | 13,150–37,350 | — | — | — | 71 |
| December | 41,765 cfs | 30,370–53,270 | — | — | — | 71 |
WHERE THESE NUMBERS COME FROM
Flow and water temperature are medians of the monthly means reported by USGS gauge 01570500 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 16,515–42,195 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.
The Susquehanna River is at its best in June — water around 75°F, flows near 22,090 cfs.
← RIVERS GOING WELL IN SEPTEMBERRegulations, 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.