Diogo Island

Island

Part of the Babuyan Islands, Diogo Island attracts divers and birdwatchers with steep shorelines, coral reefs and remote beaches; trips run from mainland Cagayan for multi-day island-hopping.

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In this guide

Diogo Island essentials

Address: Diogo Island, Babuyan/Calayan island group, northern Luzon, Philippines
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About Diogo Island

Diogo Island is a small, remote island in the northern Philippines within Cagayan province. It is part of the island groups north of Luzon and has no permanent infrastructure or towns.

The island is volcanic in origin with steep shorelines and limited landing spots, so access is by private boat and is typically infrequent. There are no major facilities and the island is visited mainly for occasional fishing or scientific surveys.

Diogo Island sits offshore in the northern Philippine maritime region and is administered as part of Cagayan Valley.

  • Administration: Part of the northern Philippine island groups and administered under Cagayan province; the island is remote and has no significant infrastructure.
When to Go

Best Time to Visit Diogo Island

The safest time for sea travel and island access is the dry season (roughly November-April); outside of that window trips can be canceled at short notice.

Dry season
November-April · 24-30°C
Calmer seas and clearer skies; the only practical window for reaching remote islands by small boat.
Monsoon season
May-October · 25-32°C
Heavy rains and frequent storms; many island landings are unsafe or cancelled.

Weather & Climate near Diogo Island

Climate

Tropical climate with hot summers (peaking in July) and warm winters (coldest in January). Temperatures range from 19°C to 31°C. Heavy rainfall (2671 mm/year), wettest in October.

Air Quality: AQI 37 Good
Best Time to Visit
AprilMarchFebruary
Temperature & Rainfall
Temperature Range
31°
Warmest Month
18°
Coldest Month
Monthly Conditions
Month Comfort Temp Feels Rain Sky Humidity Wind UV Daylight
January Good 19° - 24° 22° 206 mm overcast 79% 3.5 m/s 1.3 high 10.9h
February Very Good 19° - 25° 22° 156 mm partly cloudy 80% 3.0 m/s 1.7 very high 11.4h
March Very Good 21° - 26° 24° 106 mm partly cloudy 80% 3.1 m/s 1.9 very high 11.9h
April Excellent 23° - 28° 25° 89 mm partly cloudy 82% 3.1 m/s 2.2 extreme 12.5h
May Very Good 24° - 30° 27° 169 mm partly cloudy 82% 3.5 m/s 2.3 extreme 13.0h
June Very Good 25° - 31° 32° 207 mm partly cloudy 83% 3.2 m/s 2.5 extreme 13.2h
July Good 25° - 31° 33° 244 mm partly cloudy 83% 3.7 m/s 2.5 extreme 13.1h
August Good 25° - 31° 32° 272 mm overcast 83% 3.3 m/s 2.3 extreme 12.7h
September Good 24° - 30° 30° 317 mm overcast 82% 3.1 m/s 2.0 extreme 12.1h
October Good 24° - 29° 26° 349 mm overcast 80% 3.8 m/s 1.7 very high 11.6h
November Good 22° - 27° 24° 298 mm overcast 81% 4.3 m/s 1.3 high 11.1h
December Good 20° - 25° 23° 258 mm overcast 80% 3.9 m/s 1.1 high 10.8h
Getting There & Around

How to Get to Diogo Island

Diogo Island is reached only by private boat or charter from the Cagayan mainland (ports around Santa Ana or Aparri) or from the larger Calayan/Claveria crossings. Expect multi-hour passages; plan for sea conditions and secure local skipper experience.

Tips for Visiting Diogo Island

  • Plan charters from Cagayan's main ports (Aparri or Santa Ana) and allow large weather margins; seas in this region change quickly.
  • Visit in the dry season when the Babuyan and Bashi Channel swells are smaller; a calm morning is essential for small-boat excursions.
  • Bring all necessary supplies and medical kit-there are no services on remote islets.
  • Respect local fishing zones and ask permission before landing near inhabited islands in the chain.