As of Jun 19, 2026, 8:54 PM, peak season now, through ~August 31. Earth Exhibit tracks the live conditions and flags it the moment it is on.
Bioluminescent displays at Hook Head are caused primarily by blooms of the dinoflagellate Noctiluca scintillans (sea sparkle).
Displays are sporadic but recur most years in the warmer months when coastal waters warm and local currents concentrate blooms.
Nighttime glow appears where waves or movement disturb the surface water.
Where to see it
A taste of where to see it. The full map, exact coordinates and the best timing for each spot live in the app.
| Viewing spots |
|---|
| Hook Lighthouse grounds / east-facing shore viewpoint (public carpark) |
| Slade Harbour / Slade Strand |
| + 1 more spot, with exact coordinates and timing, in the app → |
This is the short version
This page shows a taste. The app has the full list of where to see this, the exact timing, and live conditions for 1,000+ natural phenomena worldwide, so you know the moment one is genuinely worth the trip.