This is a climate-model estimate, not a measurement: we have no measured water temperature for rivers, lakes and reservoirs yet. Real measurements are available for seas only.
Bite in Ersta today — moderate 🎣
Pressure is jumping, water +16° — most active: flounder and cod. Forecast by fish species and for the week ahead.
Bite forecast →
Water bodies in Ersta 🌊
Map of water bodies in Ersta
Water temperature in Ersta for a month
There is no exact monthly water forecast — the reference is the climate normal: in summer the water warms to about +12°. The monthly normal is below.
Monthly water temperature in Ersta 🗓️
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 0 | 0 | 0 | +3 | +9 | +12 | +12 | +10 | +4 | +1 | 0 |
Climate normal (model estimate).
Water temperature archive in Ersta on this day
| Year | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
|---|---|---|---|---|---|---|---|---|---|---|
| Water | +16° | +17° | +18° | +18° | +17° | +16° | +16° | +17° | +18° | +18° |
Climate normal (model estimate for this date), not a measurement archive.
Where else to swim nearby 🏝️
Website widget
Add the «Water temperature in Ersta» widget — free
Pick a city or body of water, size and colour — get ready-made code. Works on any site.
Get the widget →
FAQ about water in Ersta ❓
What is the water temperature in Ersta now?
Now +18° — Cool for swimming.
When is the water in Ersta warmest?
Warmest in July — up to +12°.
What bodies of water are there in Ersta?
Norwegian Sea.
Water temperature in Ersta — in detail
A summary page of water temperature across all bodies of water in Ersta: Norwegian Sea. Now about +18°. For seas the temperature is measured SST; for rivers and lakes it is a climate estimate.