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When to go · Blue Lagoon

Blue Lagoon in August

Good month. Outside the best window (All year – water stays warm; summer offers longer daylight.). Across Iceland: Still peak; puffins leave mid-month; first dark nights for auroras at the end.

Key facts

Verdict
Good
Temperature
13°C (55°F) / 8°C (46°F)
average high / low
Rain days
8
Crowds
High
Iceland overall
Prices
High
Iceland overall

Verdict

GoodIceland month rating

Outside the best window (All year – water stays warm; summer offers longer daylight.). Across Iceland: Still peak; puffins leave mid-month; first dark nights for auroras at the end.

Is another month better than August?

No other month rates higher than August for Blue Lagoon in this guide.

Weather in August

Long-term averages
  • Blue LagoonHighs around 13 °C (55 °F), lows around 8 °C (46 °F), rain on about 8 days

Festivals and holidays

Dates as our data lists them. Moving holidays (lunar and Islamic calendars, Easter) shift every year: check the date for your year before you build a trip on it.

  • Merchants' Weekend and Þjóðhátíð big impact

    First weekend of Aug (+Monday) · Iceland

    National road-trip weekend; Westman Islands festival sells out ferries.

Crowds and prices

Crowds · Iceland overall
High
Prices · Iceland overall
High

Iceland overall: Still peak; puffins leave mid-month; first dark nights for auroras at the end.

High-price month: see what to book ahead.

Compare two months

Weather, crowds and prices for any two months in Blue Lagoon, side by side.

  • Verdict

    Aug: Good

    Mar: Good

  • Daytime high

    Aug: 13 °C (55 °F)

    Mar: 4 °C (39 °F)

  • Night low

    Aug: 8 °C (46 °F)

    Mar: -2 °C (28 °F)

  • Rain days

    Aug: 8 (better)

    Mar: 12

  • Crowds

    Aug: High

    Mar: Medium

  • Prices

    Aug: High

    Mar: Medium

  • Festivals listed

    Aug: 1

    Mar: 0

August: Outside the best window (All year – water stays warm; summer offers longer daylight.). Across Iceland: Still peak; puffins leave mid-month; first dark nights for auroras at the end.

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 layer for the evenings

Build the full packing list for your trip →

Across Iceland in August →