Akstur nálægt eldgosum á Íslandi: Öryggishandbók Reykjaness 2026

Eruptions Are the New Normal on the Reykjanes Peninsula

Between December 2023 and August 2025, the Reykjanes Peninsula experienced six separate volcanic eruptions. The most recent, in July 2025, ceased on August 5. But the underlying magma system at Svartsengi continues to accumulate pressure, and Icelandic volcanologists have stated that further eruptions are highly likely.

For anyone driving in southwest Iceland — which includes the route between Keflavík Airport and Reykjavík, the Blue Lagoon, and the broader Reykjanes geopark — volcanic activity is no longer a theoretical risk. It is a recurring reality that affects road access, air quality, and travel plans multiple times per year.

This guide covers what you need to know as a driver: which roads close, how warnings work, what to do if an eruption begins while you are on the road, and how to plan around the volcanic zone.

The Affected Road Network

The eruptions on Reykjanes have repeatedly threatened or cut the road to Grindavík, the access road to the Blue Lagoon, and sections of Route 43 (Grindavíkurvegur). Lava flows from the January and February 2024 eruptions crossed the road leading to Grindavík and came within 300 metres of the Blue Lagoon facility.

The primary route between Keflavík Airport and Reykjavík — Route 41 (Reykjanesbraut) — has not been directly affected, but volcanic gas plumes can reduce visibility and air quality along this corridor during active eruptions.

Roads that have been affected or are at risk:

• Route 43 (Grindavíkurvegur): Repeatedly closed during eruptions. New lava has buried sections of this road.
• Route 426 to Blue Lagoon: Closed multiple times. Access restored between eruptions but subject to immediate closure when activity resumes.
• Grindavík town access: The town has been evacuated multiple times. Access is controlled and may require police approval.
• Route 427 (Suðurstrandarvegur): Southern coastal route past Reykjanes lighthouse. Intermittently affected by lava and gas.

How the Warning System Works

Iceland has one of the most sophisticated volcanic monitoring systems in the world. The Icelandic Meteorological Office (Veðurstofa Íslands / vedur.is) and the Department of Civil Protection and Emergency Management (almannavarnir.is) publish alerts through multiple channels:

• Vedur.is/volcanoes: Real-time seismic and deformation data. The "Aviation Colour Code" indicates eruption status — Green (no eruption), Yellow (elevated activity), Orange (eruption possible), Red (eruption in progress).
• SafeTravel.is: Travel safety alerts including road closures, hazardous areas, and evacuation zones.
• 112.is app: The Icelandic emergency app sends push notifications for volcanic alerts, road closures, and evacuation orders. Every visitor should install this app before driving in Iceland.
• Road.is: Real-time road closure map. During eruptions, affected roads are marked "Closed" (lokað) with no ambiguity.

What to Do If an Eruption Starts While You Are Driving

Eruptions on Reykjanes typically begin with a rapid escalation of seismic activity — from dozens to thousands of small earthquakes within hours — followed by a fissure opening that produces lava fountains and flowing lava. The transition from "increased seismicity" to "active eruption" can happen in as little as 30-60 minutes.

If you are driving in the Reykjanes area and an eruption begins:

1. Do not drive toward the eruption to look at it. This is the single most common mistake tourists make. Lava flows can cut roads behind you while you are busy filming the spectacle. Emergency responders have had to rescue sightseers who drove toward fissures on Reykjanes.
2. Check road.is immediately. Roads close within minutes of eruption onset. Know which direction is open and drive away from the eruption zone.
3. Be aware of volcanic gas. Eruptions produce sulphur dioxide (SO₂) and other gases. If you smell sulphur strongly, close your car windows and set ventilation to recirculate. People with asthma or respiratory conditions are especially vulnerable.
4. If driving Route 41 (Keflavík—Reykjavík): Continue your journey. This road is far enough from the eruption fissures that lava flow is not an immediate risk. However, reduce speed if visibility drops due to gas haze.
5. If driving Route 43 toward Grindavík: Turn around immediately. Do not wait for an official road closure — by the time it is posted, traffic may be blocked.
6. Follow police instructions absolutely. Icelandic police set up roadblocks quickly during eruptions. They are not suggestions — driving past a roadblock near an active eruption zone is illegal and extremely dangerous.

Blue Lagoon Access in 2026

The Blue Lagoon is Iceland's most visited attraction and sits approximately 2 km from the active eruption zone. It has been evacuated and closed multiple times since November 2023. Between eruptions, it reopens — the facility itself has not been damaged.

If you have a Blue Lagoon booking and an eruption occurs:

• Check the Blue Lagoon website and social media for closure announcements
• The facility offers full refunds for eruption-related closures
• Do not attempt to drive to the Blue Lagoon during an active eruption, even if the road appears open

Many travellers now book the Blue Lagoon for the beginning of their trip, immediately after landing at Keflavík, to maximize the chance of getting in before any eruption interrupts access.

Planning Around the Volcanic Zone

The eruption zone is geographically small — roughly a 5 km stretch of the Sundhnúkur fissure system southwest of Svartsengi. The vast majority of Iceland's road network is completely unaffected. Route 1 (Ring Road), the entire north, east, and Westfjords, the Golden Circle, the South Coast to Vík and beyond — all of these are volcanically irrelevant to the Reykjanes activity.

Practical planning tips:

• If visiting the Blue Lagoon is a priority, do it on day one — not your last day when an eruption could cancel it
• Have a backup plan: Sky Lagoon in Kópavogur, Hvammsvik hot springs, or Fontana in Laugarvatn are alternatives that are not in the volcanic zone
• If renting from Keflavík Airport, the drive to Reykjavík on Route 41 is safe even during eruptions — do not cancel your car rental because of Reykjanes activity
• Download the 112.is app and enable push notifications before you land
• Check vedur.is/volcanoes for the current aviation colour code — Orange or Red means eruption is imminent or ongoing

Can You Watch the Eruption Safely?

During the 2023-2024 eruption series, authorities designated official viewing areas at safe distances from the fissures. Whether viewing areas are opened depends on the specific eruption — lava direction, gas output, accessibility, and terrain all factor in.

If viewing areas are designated:

• Follow only the marked trails to the viewing area
• Do not cross ropes or barriers
• Wear sturdy hiking boots — new lava fields have razor-sharp edges
• Bring a wind-proof jacket and warm layers — you may be standing in the open for hours
• Do not bring children close to active lava — the terrain is treacherous and conditions change rapidly

The eruptions are genuinely spectacular. If you can view one safely and legally, it is a once-in-a-lifetime experience. But the key words are "safely" and "legally."