Dettifoss in July
Short answer: In July, Dettifoss averages about 324 m³/s, 100% of the July peak (high water). Over 2005-2024 daily flow in July ranged from 170 to 626 m³/s.
High water: 100% of peak
Glacial melt makes summer flow the strongest; the access roads can close in winter.
All months
| Month | Flow (share of peak) | Average m³/s | Level |
|---|---|---|---|
| January | 38% | 122 | Low water |
| February | 37% | 119 | Low water |
| March | 36% | 118 | Low water |
| April | 48% | 155 | Medium |
| May | 69% | 225 | Medium |
| June | 96% | 312 | High water |
| July | 100% | 324 | High water |
| August | 80% | 260 | High water |
| September | 60% | 196 | Medium |
| October | 57% | 184 | Medium |
| November | 45% | 147 | Medium |
| December | 39% | 125 | Low water |
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Questions
Is Dettifoss worth visiting in July?
In July, Dettifoss averages about 324 m³/s, 100% of the July peak (high water). Over 2005-2024 daily flow in July ranged from 170 to 626 m³/s. Glacial melt makes summer flow the strongest; the access roads can close in winter.