January in Blue Lagoon — the hardest end of the year
Hardest · 1.6/10January averages 1°C (33°F), cold enough that sightseeing works in bursts rather than in one long day on foot.
At 153 mm this is a genuinely wet month: about 0 sunny days in total, and outdoor plans need an indoor fallback.
It scores 1.6/10 here, 12th of 12 months, against 7.7/10 in the destination's best month.
Expect mid-season pricing, and crowds are light for this destination.
Pack insulated layers, a windproof shell, gloves and boots with grip, a proper rain shell rather than an umbrella, footwear you can get muddy.
If your dates are flexible, July is materially better in Blue Lagoon — 6.1 points higher on the same scale.
February in Blue Lagoon — the hardest end of the year
Hardest · 2.2/10February averages 1°C (33°F), cold enough that sightseeing works in bursts rather than in one long day on foot.
At 159 mm this is a genuinely wet month: about 0 sunny days in total, and outdoor plans need an indoor fallback.
It scores 2.2/10 here, 10th of 12 months, against 7.7/10 in the destination's best month.
Expect low-season pricing, and crowds are light for this destination.
Pack insulated layers, a windproof shell, gloves and boots with grip, a proper rain shell rather than an umbrella, footwear you can get muddy.
If your dates are flexible, July is materially better in Blue Lagoon — 5.5 points higher on the same scale.
March in Blue Lagoon — the hardest end of the year
Hardest · 3.3/10March averages 1°C (34°F), cold enough that sightseeing works in bursts rather than in one long day on foot.
At 118 mm this is a genuinely wet month: about 0 sunny days in total, and outdoor plans need an indoor fallback.
It scores 3.3/10 here, 8th of 12 months, against 7.7/10 in the destination's best month.
Expect mid-season pricing, and crowds are light for this destination.
Pack insulated layers, a windproof shell, gloves and boots with grip, a proper rain shell rather than an umbrella, footwear you can get muddy.
If your dates are flexible, July is materially better in Blue Lagoon — 4.4 points higher on the same scale.
April in Blue Lagoon — workable with trade-offs
Trade-offs · 5.3/10April averages 4°C (39°F) — jacket weather. Comfortable for walking and museums, too cool for anything water-based.
At 102 mm this is a genuinely wet month: about 8 sunny days in total, and outdoor plans need an indoor fallback.
It scores 5.3/10 here, 5th of 12 months, against 7.7/10 in the destination's best month.
Expect mid-season pricing, and crowds are moderate.
Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a proper rain shell rather than an umbrella, footwear you can get muddy.
If your dates are flexible, July is materially better in Blue Lagoon — 2.4 points higher on the same scale.
May in Blue Lagoon — workable with trade-offs
Trade-offs · 6.2/10May averages 7°C (44°F) — jacket weather. Comfortable for walking and museums, too cool for anything water-based.
At 126 mm this is a genuinely wet month: about 15 sunny days in total, and outdoor plans need an indoor fallback.
It scores 6.2/10 here, 4th of 12 months, against 7.7/10 in the destination's best month.
Expect mid-season pricing, and crowds are moderate.
Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a proper rain shell rather than an umbrella, footwear you can get muddy.
If your dates are flexible, July is materially better in Blue Lagoon — 1.5 points higher on the same scale.
June in Blue Lagoon — reliably good (2nd best month)
Good · 7.3/10June averages 9°C (48°F) — jacket weather. Comfortable for walking and museums, too cool for anything water-based.
Rainfall runs 92 mm, so plan one flexible day in three; you still get about 18 sunny days and 20.2 hours of daylight.
It scores 7.3/10 here, 2nd of 12 months, against 7.7/10 in the destination's best month.
Expect mid-season pricing, and crowds are moderate.
Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a packable rain layer, footwear you can get muddy.
July in Blue Lagoon — the year's strongest window
Best window · 7.7/10July averages 11°C (51°F) — jacket weather. Comfortable for walking and museums, too cool for anything water-based.
Rainfall runs 81 mm, so plan one flexible day in three; you still get about 17 sunny days and 19.1 hours of daylight.
On our climate-comfort scale this is the top-ranked month of the year for Blue Lagoon at 7.7/10 — the reference point every other month on this page is measured against.
Expect peak pricing, and this is one of the busiest months here. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a packable rain layer, footwear you can get muddy.
August in Blue Lagoon — workable with trade-offs
Trade-offs · 6.5/10August averages 11°C (51°F) — jacket weather. Comfortable for walking and museums, too cool for anything water-based.
At 116 mm this is a genuinely wet month: about 10 sunny days in total, and outdoor plans need an indoor fallback.
It scores 6.5/10 here, 3rd of 12 months, against 7.7/10 in the destination's best month.
Expect peak pricing, and this is one of the busiest months here. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a proper rain shell rather than an umbrella, footwear you can get muddy.
September in Blue Lagoon — workable with trade-offs
Trade-offs · 5/10September averages 8°C (47°F) — jacket weather. Comfortable for walking and museums, too cool for anything water-based.
At 106 mm this is a genuinely wet month: about 0 sunny days in total, and outdoor plans need an indoor fallback.
It scores 5/10 here, 6th of 12 months, against 7.7/10 in the destination's best month.
Expect mid-season pricing, and crowds are moderate.
Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a proper rain shell rather than an umbrella, footwear you can get muddy.
If your dates are flexible, July is materially better in Blue Lagoon — 2.7 points higher on the same scale.
October in Blue Lagoon — the hardest end of the year
Hardest · 3.6/10October averages 5°C (41°F) — jacket weather. Comfortable for walking and museums, too cool for anything water-based.
At 116 mm this is a genuinely wet month: about 0 sunny days in total, and outdoor plans need an indoor fallback.
It scores 3.6/10 here, 7th of 12 months, against 7.7/10 in the destination's best month.
Expect low-season pricing, and crowds are light for this destination.
Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a proper rain shell rather than an umbrella, footwear you can get muddy.
If your dates are flexible, July is materially better in Blue Lagoon — 4.1 points higher on the same scale.
November in Blue Lagoon — the hardest end of the year
Hardest · 2.9/10November averages 4°C (38°F), cold enough that sightseeing works in bursts rather than in one long day on foot.
Rainfall runs 96 mm, so plan one flexible day in three; you still get about 0 sunny days and 6 hours of daylight.
It scores 2.9/10 here, 9th of 12 months, against 7.7/10 in the destination's best month.
Expect low-season pricing, and crowds are light for this destination.
Pack insulated layers, a windproof shell, gloves and boots with grip, a packable rain layer, footwear you can get muddy.
If your dates are flexible, July is materially better in Blue Lagoon — 4.8 points higher on the same scale.
December in Blue Lagoon — the hardest end of the year
Hardest · 1.8/10December averages 0°C (31°F), cold enough that sightseeing works in bursts rather than in one long day on foot.
At 124 mm this is a genuinely wet month: about 0 sunny days in total, and outdoor plans need an indoor fallback.
It scores 1.8/10 here, 11th of 12 months, against 7.7/10 in the destination's best month.
Expect mid-season pricing, and crowds are light for this destination.
Pack insulated layers, a windproof shell, gloves and boots with grip, a proper rain shell rather than an umbrella, footwear you can get muddy.
If your dates are flexible, July is materially better in Blue Lagoon — 5.9 points higher on the same scale.
