When To Go · Destination Guide
Tide-timed wrecks, kelp-clad pinnacles, and wild Atlantic days around Lundy's grey seals
When to go
May to September gives the strongest overlap of regular sea access, charter activity, longer daylight, and less severe water temperature, with July to September usually the most comfortable underwater period.
Best overall window
The best overlap of sea transport, dive operations, long daylight, island events, and gradually warmer water.
Outside that window
Storm Disruptions.
Start with the overall answer, then switch only when scuba, freedive, snorkel, or topside timing changes the trip in a meaningful way.
The overall row stays visible so you can compare it against the currently selected scope.
| Scope | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Overall | Overall - Jan: More variable | Overall - Feb: More variable | Overall - Mar: More variable | Overall - Apr: Good | Overall - May: Best | Overall - Jun: Best | Overall - Jul: Best | Overall - Aug: Best | Overall - Sep: Best | Overall - Oct: Good | Overall - Nov: More variable | Overall - Dec: More variable |
These regional shifts apply only to the selected scope.
| Area | Best months | Why it changes |
|---|---|---|
| Lundy Island | May to September | The island's useful season is constrained more by marine access and daybyday weather than by air temperature alone. Main caution: Trip Cancellations. |
| North Devon Mainland | April to October | Ilfracombe, Woolacombe, Hartland, Lynton, and Exmoor preserve trip value even when Lundy transport is disrupted. Main caution: School Holiday Crowds. |
These do not replace the overall planner. Use them only if a specific animal or event is driving your trip dates.
Grey seal pupping and higher island counts
Best for Scuba, Freedive, Snorkel, Topside
Aug to Oct
Seal numbers around Lundy rise around the pupping period.
Puffins and breeding seabirds
Best for Topside, Snorkel
Apr to Jul
Spring through midsummer is the practical window for puffins and other breeding seabirds around Lundy's cliffs, although exact abundance and departure timing vary.
Spider crab activity
Best for Scuba, Snorkel
Jul to Aug
A North Devon operator reports spider crabs as a recurring midsummer highlight on its Lundy trips.
Spring plankton productivity
Best for Scuba, Freedive, Snorkel
Apr to Jun
Productive spring water can support rich marine life but may reduce underwater visibility.
Autumn bird migration
Best for Topside
Sep to Oct
Lundy's position in the Bristol Channel makes autumn migration a compelling reason to add time ashore.
Built from climate references, access rules, and destination operators. Wildlife timing and route flexibility can shift year to year.