Northern lights Saaremaa tonight
Saaremaa is Estonia's largest island in the Baltic Sea at 58°N magnetic latitude - one of the darkest and most aurora-accessible locations in the Baltic region. Kp 3–4 is enough for aurora from the coastal dark sites. Harilaid on the northwest tip reaches Bortle Class 2. The Angla windmills provide an unusual Estonian foreground for aurora photography. Connected to the mainland by ferry and causeway. Best season: September to April.
Aurora visibility - Saaremaa
Unlikely tonight
Kp 1 is well below the Kp 3–4 threshold needed for aurora to be visible from Saaremaa.
Current Kp
1
of 9
7-day outlook for Saaremaa
Today
21 May
Tomorrow
22 May
Sat
23 May
Sun
24 May
Mon
25 May
Tue
26 May
Wed
27 May
Based on CME arrival predictions from NASA DONKI. Arrival times ±6 hours.
What Kp is needed here?
Saaremaa sits at a magnetic latitude of approximately 58°N. The Kp index - a global measure of geomagnetic activity on a scale from 0 (quiet) to 9 (extreme storm), updated every 3 hours - needs to reach Kp 3–4 before the auroral oval expands far enough south to be visible from here.
At Kp 3–4, visibility is possible from Saaremaa but skies need to be clear and dark. Cloud cover and light pollution remain the main obstacles even when Kp is high enough.
Best dark sky sites near Saaremaa
Light pollution is the biggest obstacle after cloud cover. These sites give you the best dark northern horizon within reach.
Sõrve Peninsula - Sääre lighthouse
Get directions ↗Sõrve is the southernmost peninsula of Saaremaa, tapering to a narrow point at Sääre where a lighthouse stands at the tip. The surrounding land is flat agriculture and forest with no settlement at the point, and the road is paved to Sääre village then gravel to the lighthouse itself. The peninsula has a WWII German military history with bunkers visible along the road. Bortle Class 2-3 throughout the lower Sõrve peninsula, with a completely unobstructed north sky from the tip.
Harilaid Nature Reserve
Get directions ↗Harilaid is a narrow peninsula on the northwestern tip of Saaremaa, designated as a nature reserve protecting coastal dunes and seabird colonies. There are no buildings and no artificial lighting within the reserve; it faces northwest and north over open Baltic Sea with no significant land between Saaremaa and northern Sweden. The track to the nature reserve is unsealed and may require a car with reasonable ground clearance in wet conditions. Bortle Class 2 throughout, with the nearest settlement at Kihelkonna 15 km to the south contributing negligible sky glow.
Angla windmill hill
Get directions ↗Angla is a hilltop with Estonia's largest collection of traditional wooden windmills - five still standing in a row on the ridge above the Kaarma parish farmland. The ridge orientation faces north, providing a clear aurora viewing direction, with the windmill silhouettes forming a distinctive foreground for photography. The surrounding countryside is agricultural with minimal light pollution in any direction, and an information board and small car park are at the site. Bortle Class 3, with the elevated ridge giving sightlines across flat Saaremaa farmland toward the northern horizon.
Best time to see the northern lights in Saaremaa
Saaremaa's aurora season runs from late September through to March, when nights are long enough for truly dark skies. The equinox months, September and March, bring a natural boost in geomagnetic activity, making them statistically the best of the season. Summer months bring too much twilight for aurora to be visible at this latitude.
Activity peaks around the September and March equinoxes, when Earth's magnetic field geometry is most favourable for coupling with the solar wind. Events during these two windows tend to produce the strongest displays of the year for observers at Saaremaa's latitude.
April through August brings persistent astronomical twilight that washes out aurora completely. Even strong events (Kp 6+) remain invisible during this period because the sky never gets dark enough.
Other Estonia aurora forecasts
← Estonia overviewRelated pages
Northern Lights Estonia
Estonia-wide aurora forecast hub.
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What Is the Kp Index?
How Kp 3-4 determines aurora visibility at 58°N.
Common questions
Northern lights from Saaremaa - Harilaid, Sõrve Peninsula, Angla windmills, and when to go.