When to go · Blue Lagoon
Blue Lagoon in May
Good month. Outside the best window (All year – water stays warm; summer offers longer daylight.). Across Iceland: Long days, puffins, fewer crowds; highlands still closed.
Key facts
- Verdict
- Good
- Temperature
- 11°C (52°F)52°F (11°C) / 3°C (37°F)37°F (3°C)
- average high / low
- Rain days
- 9
- Crowds
- Medium
- Iceland overall
- Prices
- Medium
- Iceland overall
Verdict
Outside the best window (All year – water stays warm; summer offers longer daylight.). Across Iceland: Long days, puffins, fewer crowds; highlands still closed.
Is another month better than May?
No other month rates higher than May for Blue Lagoon in this guide.
Weather in May
- Blue LagoonHighs around 11 °C (52 °F), lows around 3 °C (37 °F), rain on about 9 daysHighs around 52 °F (11 °C), lows around 37 °F (3 °C), rain on about 9 days
Crowds and prices
- Crowds · Iceland overall
- Medium
- Prices · Iceland overall
- Medium
Iceland overall: Long days, puffins, fewer crowds; highlands still closed.
Compare two months
Weather, crowds and prices for any two months in Blue Lagoon, side by side.
Verdict
May: Good
Mar: Good
Daytime high
May: 11 °C (52 °F)52 °F (11 °C)
Mar: 4 °C (39 °F)39 °F (4 °C)
Night low
May: 3 °C (37 °F)37 °F (3 °C)
Mar: -2 °C (28 °F)28 °F (-2 °C)
Rain days
May: 9 (better)
Mar: 12
Crowds
May: Medium
Mar: Medium
Prices
May: Medium
Mar: Medium
Festivals listed
May: 0
Mar: 0
May: Outside the best window (All year – water stays warm; summer offers longer daylight.). Across Iceland: Long days, puffins, fewer crowds; highlands still closed.
March: Outside the best window (All year – water stays warm; summer offers longer daylight.). Across Iceland: Balance of light and dark: auroras plus 11–13 h of day; Easter in late March 2027.
Blue Lagoon: figures are long-term averages from this guide, not a forecast.
What to pack
- A warm coat, hat and gloves for mornings and evenings