Atlantic
Azores — Flores & Corvo
Portugal
About a dozen dusky groupers at once in Corvo's voluntary reserve

Country
12 dive destinations in Portugal, up to 1,980 km apart. Water temperature across them runs 13–25 °C. All 12 are in season in Jun–Oct. 113 named dive sites have their own pages.
Berlengas & Peniche · photo Tiago Thedim
RegionAtlantic
Numbers match the table below. Land outline: Natural Earth (public domain).
| # | Destination | Best months | Water | Visibility | Depth | Level | Access | Sites |
|---|---|---|---|---|---|---|---|---|
| 1 | Azores — Flores & Corvo | Jun–Sep | 16–23°C | — | 12–40 m | Intermediatesites from beginner to advanced | Day boat, Shore | 7 |
| 2 | Berlengas & Peniche | Jun–Sep | 14–20°C | 8–25 m | 8–30 m | Intermediatesites from beginner to advanced | Day boat | 15 |
| 3 | Azores — São Jorge & Graciosa | Jun–Sep | 16–23°C | — | 5–25 m | Intermediatesites from beginner to advanced | Day boat | 5 |
| 4 | Cascais & Cabo Raso | Year-round | 15–20°C | — | 6–30 m | Beginnersites from beginner to intermediate | Day boat | 7 |
| 5 | Azores — Terceira | Jun–Sep | 15–25°C | — | 3–25 m | Intermediatesites from beginner to advanced | Shore, Day boat | 7 |
| 6 | Azores — Pico & Faial | Jun–Sep | 16–25°C | 15–30 m | 18–40 m | Advanced | Day boat | 3 |
| 7 | Sesimbra & the Arrábida | Aug–Oct | 13–18°C | 1–15 m | 8–65 m | Intermediatesites from intermediate to advanced | Shore, Day boat | 11 |
| 8 | Azores — São Miguel | Jun–Sep | 16–25°C | 5–25 m | 4–35 m | Intermediatesites from intermediate to advanced | Shore, Day boat | 11 |
| 9 | Algarve — Ocean Revival | Jun–Sep | 15–23°C | 1–10 m | 15–32 m | Intermediatesites from beginner to advanced | Day boat | 13 |
| 10 | Azores — Santa Maria | Jul–Sep | 17–25°C | 20–40 m | 5–40 m | Intermediatesites from beginner to advanced | Day boat, Shore | 11 |
| 11 | Porto Santo | Jul–Oct | 17–23°C | 5–30 m | 2–30 m | Intermediatesites from beginner to advanced | Shore, Day boat | 12 |
| 12 | Madeira | Jun–Sep | 19–24°C | 5–25 m | 5–35 m | Intermediatesites from beginner to advanced | Shore, Day boat | 11 |
The most destinations are rated good or prime at the same time in Jun–Oct: 12 of 12. Each row is one destination's own season rating.
| Destination | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1Azores — Flores & Corvo | Fair | Fair | Fair | Fair | Fair | Prime | Prime | Prime | Prime | Good | Fair | Fair |
| 2Berlengas & Peniche | Off-season | Off-season | Fair | Fair | Good | Prime | Prime | Prime | Prime | Good | Fair | Off-season |
| 3Azores — São Jorge & Graciosa | Fair | Fair | Fair | Fair | Fair | Prime | Prime | Prime | Prime | Good | Fair | Fair |
| 4Cascais & Cabo Raso | Good | Good | Good | Good | Good | Good | Good | Good | Good | Good | Good | Good |
| 5Azores — Terceira | Good | Good | Fair | Fair | Fair | Prime | Prime | Prime | Prime | Good | Good | Good |
| 6Azores — Pico & Faial | Off-season | Off-season | Off-season | Fair | Good | Prime | Prime | Prime | Prime | Good | Fair | Off-season |
| 7Sesimbra & the Arrábida | Fair | Fair | Fair | Fair | Good | Good | Good | Prime | Prime | Prime | Good | Fair |
| 8Azores — São Miguel | Fair | Fair | Fair | Fair | Good | Prime | Prime | Prime | Prime | Good | Fair | Fair |
| 9Algarve | Off-season | Off-season | Fair | Good | Good | Prime | Prime | Prime | Prime | Good | Fair | Off-season |
| 10Azores — Santa Maria | Off-season | Off-season | Off-season | Off-season | Good | Good | Prime | Prime | Prime | Good | Off-season | Off-season |
| 11Porto Santo | Fair | Fair | Fair | Good | Good | Good | Prime | Prime | Prime | Prime | Good | Fair |
| 12Madeira | Fair | Fair | Fair | Good | Good | Prime | Prime | Prime | Prime | Good | Fair | Fair |
| Good or prime | 2 | 2 | 1 | 4 | 9 | 12 | 12 | 12 | 12 | 12 | 4 | 2 |
Destinations that fit within 200 km of each other end to end and share at least one month rated good or prime. Distances are straight lines between destinations, not travel routes.
113 km end to end
In season together: May–Oct
123 km end to end
In season together: Jun–Oct
72 km end to end
In season together: Apr–Oct
100 km end to end
In season together: May–Oct
Atlantic
Portugal
About a dozen dusky groupers at once in Corvo's voluntary reserve
Pink granite caves and tunnels in cold Atlantic swell off Peniche
Atlantic
Portugal
Pelagic schools on Rosais Reef and resident groupers in Pesqueiro Alto's caves
Atlantic
Portugal
Atlantic reef, gorges and a sea cave a train ride from Lisbon
Atlantic
Portugal
Centuries of lost anchors and an 1878 steamer wreck in Angra bay
Open-water mobula ray carousels at Princess Alice Bank each summer
The River Gurara wreck and gorgonian rock south of Lisbon
Atlantic
Portugal
The WWII Liberty ship Dori in 21m, minutes off Ponta Delgada
Atlantic
Portugal
Four Portuguese Navy ships scuttled together on one sand plain
Atlantic
Portugal
Mobula rays over the Baixa do Ambrósio seamount each summer
Two scuttled ships and rocky reefs around the islets, 2 m to 30 m
Boulder swim-throughs at Garajau, monk seals and mantas off the Desertas