Grimsvatn water temperature
Grimsvatn · Lake
The current water temperature at Grimsvatn is 6.8 °C (as of October 16, 2026, source: official monitoring networks).
Lakes stratify in summer: bathing-warm on top, markedly colder a few metres down. Measurements are taken at the surface — right where you swim.
Measurement series & statistics
This measurement series includes 382 data points since August 17, 2026.
Lowest recorded value: 6.5 °C on October 14, 2026 · highest value: 16.4 °C on August 27, 2026.
In October, temperatures have ranged between 6.5 °C and 9.0 °C.
The current value is 1.2 °C below the October average of this series.
Nearby waters
Frequently asked questions
Can you swim at Grimsvatn right now?
The current water temperature is 6.8 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Grimsvatn?
Currently 6.8 °C (updated continuously).
How warm is at Grimsvatn in October?
In October, the water temperature recently averaged 8.0 °C.
When is the water warmest at Grimsvatn?
Across the measurement record, August is on average the warmest month (14.1 °C).
