Gentle breeze

SSE · gusts 6 m/s

Monday 19 October · Northeast

Grjótagjá weather, live

4°

Overcast

Icelandic: Alskýjað

Feels like 1°

Gentle breeze

SSE · gusts 6 m/s

Settled. Overcast, 4 °C.

The sky over Grjótagjá at 17:35, drawn from the forecast.

Updated 19 October 2026 at 17:35

Measured 17:30Vogar · 1.8 km · 5 min ago4°3 m/sgusts 668 %

The next 48 hours

What to wear

If you're out for an hour or so

Feels like 0°

Wool sweater
Stays warm even when damp
Windproof shell
Warm hat
Gloves
Sturdy, waterproof shoes

Driving today

Warnings, gusts and road ice over the next 12 hours

Good driving conditions

No warnings, no strong gusts and nothing pointing to ice.

Always check umferdin.is and safetravel.is before you set off.

Mývatnsheiði15 km · 350 m
5↑6Air 3°Road 4°
Hólasandur16 km · 370 m
4↑6Air 4°Road 4°
Mývatnsöræfi18 km · 401 m
3↑5Air 4°Road 4°
Dettifoss29 km · 373 m
5↑7Air 3°Road 3°

Road conditions on umferdin.is

Before you go

Lava cave with a brilliant blue hot spring; look only, the water's too hot to bathe.

10 days

Highs, lows, rain and the strongest gust each day

Afternoon
4°
5 m/s · ↑11
Evening
4°
6 m/s · ↑11 · 0.1 mm
Night
3°
3 m/s · ↑9 · 1.0 mm
Morning
4°
3 m/s · ↑5 · 2.8 mm
Afternoon
3°
3 m/s · ↑6 · 2.4 mm
Evening
1°
4 m/s · ↑4
Night
-1°
5 m/s · ↑5
Morning
0°
4 m/s · ↑4
Afternoon
1°
2 m/s · ↑8
Evening
0°
3 m/s · ↑8 · 0.4 mm
Night
0°
2 m/s · ↑4
Morning
-1°
2 m/s · ↑3
Afternoon
-3°
1 m/s · ↑4 · 0.2 mm
Evening
-2°
1 m/s · ↑2
Night
-4°
1 m/s · ↑1
Morning
-4°
1 m/s · ↑3
Afternoon
-2°
2 m/s · ↑4 · 0.1 mm
Evening
-2°
4 m/s · ↑4
Night
-3°
5 m/s · ↑6 · 0.1 mm
Morning
-3°
3 m/s · ↑5
Afternoon
-2°
2 m/s · ↑7
Evening
-3°
1 m/s · ↑7
Night
-5°
1 m/s · ↑8
Morning
-6°
1 m/s · ↑8
Afternoon
-5°
2 m/s · ↑4 · 0.2 mm
Evening
-4°
2 m/s · ↑4 · 1.1 mm
Night
-3°
2 m/s · ↑5 · 4.1 mm
Morning
-2°
3 m/s · ↑5 · 4.1 mm
Afternoon
-2°
1 m/s · ↑5 · 0.9 mm
Evening
0°
1 m/s · ↑3 · 0.2 mm
Night
0°
2 m/s · ↑4
Morning
-1°
2 m/s · ↑4
Afternoon
-1°
2 m/s · ↑4
Evening
-2°
1 m/s · ↑3
Night
-2°
1 m/s · ↑3 · 0.2 mm
Morning
-1°
2 m/s · ↑4
Afternoon
-1°
2 m/s · ↑4 · 0.1 mm
Evening
0°
2 m/s · ↑4 · 0.5 mm

Wind

Mean wind and gusts, m/s

No strong gusts in the next two days.

Mean wind Gusts

The second number is the one that matters: gusts flip trailers and rip car doors off their hinges.

The weeks ahead

Grjótagjá: two weeks day by day, then the weeks after and the season ahead — each compared with the usual weather.

The whole country, two weeks ahead →

The next three days · 19–21 Oct
A little warmer than usual
-2° – 6° · +1.0°Fairly sure
Rain or snow most days · Gales possible
The rest of the week · 22–25 Oct
Colder than usual
-4° – 1° · −2.5°Could still change
Rain or snow most days · snow possible · Breezy
The week after · 26 Oct – 2 Nov
A little colder than usual
-3° – 2° · −0.9°Very uncertain
Rain or snow most days · Breezy

Day by day

ECMWF runs its forecast 51 times with slightly different starting points. Where the runs agree, the forecast is sure; the further ahead, the more they drift apart.

Chance of rain or snow

Strongest gusts, m/s

Likely high and low
8 in 10 runs fall inside
Usual for the time of year
Tap a day for the details.

Further ahead

Beyond two weeks no forecast can say which day it rains — but ECMWF's extended forecast can tell whether a week leans warmer or wetter than usual, and how sure it is. Paler bars mean a weaker lean.

WeekTemperatureRain and snow

2–8 Nov
usually 2° / -4°
+0.5° A little warmer than usual
58% likely
About the usual rain and snow
9–15 Nov
usually 2° / -5°
+0.4° About usual
About the usual rain and snow
16–22 Nov
usually 1° / -5°
+0.3° About usual
About the usual rain and snow
23–29 Nov
usually 1° / -6°
+0.2° About usual
About the usual rain and snow

The season ahead

ECMWF's seasonal forecast, month by month. Read it as a lean, not a forecast — for packing, the usual weather is still your best guide.

November
Usually 1° / -5° in Mývatn
+0.8° A little warmer than usual
About the usual rain and snow
November in detail
December
Usually 0° / -7° in Mývatn
+0.5° A little warmer than usual
About the usual rain and snow
December in detail
January
Usually 0° / -7° in Mývatn
+0.5° A little warmer than usual
About the usual rain and snow
January in detail

Ensemble, extended-range (EC46) and seasonal (SEAS5) forecasts: ECMWF via Open-Meteo.com, CC BY 4.0. Icelandic Met Office, Reykjahlíð 1991–2020.

Daylight

9 h 12 min of daylight

↓ 7 min 0 s shorter than yesterday

Sunrise: 08:15
Sunset: 17:28
Golden hour: 16:09–17:28
Fully dark: 19:18–06:27

Northern lights tonight

Clouded out

Dark 19:18–06:27

Cloud cover through the night

1906

Activity (Kp)

Tonight

5.0

Tue

3.7

Wed

3.3

Get away from street lights and give your eyes fifteen minutes.

From the forecaster

Written by the duty meteorologists at the Icelandic Met Office

South and southwest 5-13 m/s and wiedly rain og showers of rain, but mainly dry in the northeast.

South 8-13 m/s at the east coast tomorrow, but much lighter winds elsewhere. Rain or sleet in the east parts, later snow in mountains, but scattered showers of rain or sleet elsewhere. Temperatures 3 to 10 deg C, mildest in the Eastfjords.

Written today at 15:12 · vedur.is

Regional forecasts are only written in Icelandic, so this is the national one.

In short

Tonight
Southeasterly 2–6 m/s, a little rain. 3 to 4 °C.
Tomorrow
Light winds, rain. 1 to 4 °C.
Wednesday
Variable 1–4 m/s, a little snow. -2 to 1 °C.

Typical weather by month

1991–2020 averages for Mývatn

high / low · wet days · Icelandic Met Office, Reykjahlíð 1991–2020

Questions visitors ask

What is the weather in Grjótagjá right now?

4 °C and overcast, wind 3 m/s from the southeast, gusting 6 m/s. Measured at Vogar at 17:30 on 19 October 2026.

What will the weather be like in Grjótagjá over the next two weeks?

The next three days (19–21 Oct): a little warmer than usual, -2 to 6 °C, rain or snow most days, gales possible. The rest of the week (22–25 Oct): colder than usual, -4 to 1 °C, rain or snow most days, snow possible, breezy. The week after (26 Oct – 2 Nov): a little colder than usual, -3 to 2 °C, rain or snow most days, breezy. Based on ECMWF's 51-run ensemble forecast as of 19 October 2026; the further ahead, the less certain.

What should I wear in Grjótagjá today?

Dress for the wind, not the thermometer: wool sweater, windproof shell, warm hat, gloves and sturdy, waterproof shoes.

Is it safe to drive to Grjótagjá today?

Good driving conditions. No warnings, no strong gusts and nothing pointing to ice. Always check road conditions on umferdin.is before you set off.

Can I see the northern lights in Grjótagjá tonight?

Clouded out. Dark 19:18–06:27.

When is sunrise and sunset in Grjótagjá today?

Sunrise is at 08:15 and sunset at 17:28 — 9 h 12 min of daylight. Iceland is on UTC all year.

Nearby

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The moving streaks follow the wind as it's measured right now.

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