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When to go · Blue Lagoon

Blue Lagoon, month by month

Good months for Blue Lagoon: Mar, Apr, May, Jun, Jul, Aug, Sep, Oct.

Month by month

  1. JanuaryMixedOutside the best window (All year – water stays warm; summer offers longer daylight.). Across Iceland: 4–5 h of light, storms, ice caves and auroras; keep buffer days.2 °C (36 °F) / -3 °C (27 °F), 15 rain daysCrowds: Low · 1 festival or holiday
  2. FebruaryMixedOutside the best window (All year – water stays warm; summer offers longer daylight.). Across Iceland: Longer days, still stormy; Þorrablót food and aurora nights.2 °C (36 °F) / -3 °C (27 °F), 13 rain daysCrowds: Medium
  3. MarchGoodOutside 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 2027.4 °C (39 °F) / -2 °C (28 °F), 12 rain daysCrowds: Medium
  4. AprilGoodOutside the best window (All year – water stays warm; summer offers longer daylight.). Across Iceland: Quiet shoulder month; snow lingers in the north; puffins arrive late in the month.7 °C (45 °F) / 0 °C (32 °F), 11 rain daysCrowds: Low
  5. MayGoodOutside the best window (All year – water stays warm; summer offers longer daylight.). Across Iceland: Long days, puffins, fewer crowds; highlands still closed.11 °C (52 °F) / 3 °C (37 °F), 9 rain daysCrowds: Medium
  6. JuneGoodOutside the best window (All year – water stays warm; summer offers longer daylight.). Across Iceland: Near-constant light, open roads, National Day on the 17th; highland roads open late in the month.13 °C (55 °F) / 6 °C (43 °F), 8 rain daysCrowds: High
  7. JulyGoodOutside the best window (All year – water stays warm; summer offers longer daylight.). Across Iceland: Warmest and busiest; F-roads and Laugavegur trek open; book everything.14 °C (57 °F) / 8 °C (46 °F), 7 rain daysCrowds: High
  8. AugustGoodOutside 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.13 °C (55 °F) / 8 °C (46 °F), 8 rain daysCrowds: High · 1 festival or holiday
  9. SeptemberGoodOutside the best window (All year – water stays warm; summer offers longer daylight.). Across Iceland: Autumn colours, aurora season begins, highlands close; great shoulder month.11 °C (52 °F) / 6 °C (43 °F), 10 rain daysCrowds: Medium
  10. OctoberGoodOutside the best window (All year – water stays warm; summer offers longer daylight.). Across Iceland: Auroras and fewer crowds; first storms and snow in the north.8 °C (46 °F) / 3 °C (37 °F), 13 rain daysCrowds: Medium
  11. NovemberMixedOutside the best window (All year – water stays warm; summer offers longer daylight.). Across Iceland: Short days, storms; Iceland Airwaves; ice caves open.5 °C (41 °F) / 0 °C (32 °F), 15 rain daysCrowds: Low
  12. DecemberMixedOutside the best window (All year – water stays warm; summer offers longer daylight.). Across Iceland: Darkest month, Christmas lights and fireworks; storms can close roads for days.3 °C (37 °F) / -2 °C (28 °F), 16 rain daysCrowds: Medium · 1 festival or holiday

Compare two months

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

  • Verdict

    Mar: Good

    Apr: Good

  • Daytime high

    Mar: 4 °C (39 °F)

    Apr: 7 °C (45 °F)

  • Night low

    Mar: -2 °C (28 °F)

    Apr: 0 °C (32 °F)

  • Rain days

    Mar: 12

    Apr: 11 (better)

  • Crowds

    Mar: Medium

    Apr: Low

  • Prices

    Mar: Medium

    Apr: Medium

  • Festivals listed

    Mar: 0

    Apr: 0

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.

April: Outside the best window (All year – water stays warm; summer offers longer daylight.). Across Iceland: Quiet shoulder month; snow lingers in the north; puffins arrive late in the month.

Blue Lagoon: figures are long-term averages from this guide, not a forecast.