Siayan Island

Island Small northern Philippine island in the Cagayan region

Small island off Cagayan in northern Philippines, reached by local boats; visited by anglers and seabird watchers for rocky coasts and secluded beaches.

Main image
Siayan Island
Siayan Island, Cagayan Valley, Philippines
20.9039, 121.9029
Open access
Free (island access by boat)

How to Get to Siayan Island #

Access is by private boat or hired fishing craft from ports on northern Cagayan Province. Travel times vary by departure point; local skippers know how to read tides and reef channels.

Tips for Visiting Siayan Island #

  • Hire a local fisherman in northern Cagayan to arrange landing - tides and winds can make approaches tricky.
  • Bring sunscreen and a hat: exposed beaches have little shade.
  • Explore cautiously - some parts are rocky and the island has limited facilities.

Best Time to Visit Siayan Island #

Best visited in the dry season (November-April) when sea conditions are milder and boat access is more reliable.

Dry season
Nov-Apr · 24-32°C (75-90°F)
Calmer seas and easier boat access.
Monsoon season
May-Oct · 25-33°C (77-91°F)
Higher risk of heavy rains and rougher waters; not recommended for casual visits.

Weather & Climate near Siayan Island #

Climate

Tropical climate with hot summers (peaking in July) and warm winters (coldest in January). Temperatures range from 20°C to 32°C. Heavy rainfall (2762 mm/year), wettest in October.

Best Time to Visit
AprilMarchFebruary
Temperature & Rainfall
Temperature Range
31°
Warmest Month
17°
Coldest Month
Monthly Conditions

January

January is mild with highs of 25°C and lows of 21°C. Heavy rain (228 mm), mostly overcast skies, and breezy conditions.

64 Good

Comfort

23°
Feels Like Mild
23°C
Temperature
21° 25°
79%
Humidity
Very Humid

Weather

228 mm
Rainfall
6.5 m/s
Wind
Breezy
1.3
UV Index
High
10.9h daylight

February

February is mild with highs of 25°C and lows of 20°C. Significant rainfall (165 mm) and partly cloudy skies.

72 Very Good

Comfort

23°
Feels Like Mild
23°C
Temperature
20° 25°
80%
Humidity
Very Humid

Weather

165 mm
Rainfall
5.3 m/s
Wind
Light Breeze
1.7
UV Index
Very High
11.4h daylight

March

March is warm with highs of 27°C and lows of 22°C. Significant rainfall (107 mm) and partly cloudy skies.

76 Very Good

Comfort

24°
Feels Like Warm
24°C
Temperature
22° 27°
81%
Humidity
Very Humid

Weather

107 mm
Rainfall
4.1 m/s
Wind
Light Breeze
1.9
UV Index
Very High
11.9h daylight

April

April is warm with muggy conditions (dew point 23°C). Regular rainfall (93 mm) and partly cloudy skies.

82 Excellent

Comfort

26°
Feels Like Warm
26°C
Temperature
23° 29°
82%
Humidity
Very Humid

Weather

93 mm
Rainfall
3.3 m/s
Wind
Light Breeze
2.2
UV Index
Extreme
12.5h daylight

May

May is hot, feeling like 31°C with oppressive humidity. Significant rainfall (176 mm) and partly cloudy skies.

71 Very Good

Comfort

31°
Feels Like Hot
28°C
Temperature
25° 30°
83%
Humidity
Very Humid

Weather

176 mm
Rainfall
2.9 m/s
Wind
Calm
2.3
UV Index
Extreme
13.0h daylight

June

June is hot, feeling like 35°C with oppressive humidity. Heavy rain (229 mm) and partly cloudy skies.

60 Good

Comfort

35°
Feels Like Hot
29°C
Temperature
26° 32°
84%
Humidity
Very Humid

Weather

229 mm
Rainfall
3.0 m/s
Wind
Light Breeze
2.5
UV Index
Extreme
13.2h daylight

July

July is the hottest month, feeling like 36°C with oppressive humidity. Heavy rain (247 mm) and partly cloudy skies.

59 Acceptable

Comfort

36°
Feels Like Hot
29°C
Temperature
26° 32°
83%
Humidity
Very Humid

Weather

247 mm
Rainfall
2.8 m/s
Wind
Calm
2.5
UV Index
Extreme
13.1h daylight

August

August is hot, feeling like 35°C with oppressive humidity. Heavy rain (274 mm) and mostly overcast skies.

55 Acceptable

Comfort

35°
Feels Like Hot
29°C
Temperature
26° 32°
84%
Humidity
Very Humid

Weather

274 mm
Rainfall
2.9 m/s
Wind
Calm
2.3
UV Index
Extreme
12.7h daylight

September

September is hot, feeling like 33°C with oppressive humidity. Heavy rain (325 mm) and mostly overcast skies.

57 Acceptable

Comfort

33°
Feels Like Hot
28°C
Temperature
25° 31°
82%
Humidity
Very Humid

Weather

325 mm
Rainfall
2.5 m/s
Wind
Calm
2.0
UV Index
Extreme
12.1h daylight

October

October is hot, feeling like 30°C due to high humidity. The wettest month with heavy rain (359 mm) and mostly overcast skies.

65 Good

Comfort

30°
Feels Like Hot
27°C
Temperature
25° 30°
80%
Humidity
Very Humid

Weather

359 mm
Rainfall
2.6 m/s
Wind
Calm
1.7
UV Index
Very High
11.6h daylight

November

November is warm with muggy conditions (dew point 23°C). Heavy rain (295 mm) and mostly overcast skies.

66 Good

Comfort

26°
Feels Like Warm
26°C
Temperature
23° 28°
81%
Humidity
Very Humid

Weather

295 mm
Rainfall
4.4 m/s
Wind
Light Breeze
1.3
UV Index
High
11.1h daylight

December

December is mild with highs of 26°C and lows of 22°C. Heavy rain (264 mm) and mostly overcast skies.

64 Good

Comfort

24°
Feels Like Mild
24°C
Temperature
22° 26°
79%
Humidity
Very Humid

Weather

264 mm
Rainfall
5.2 m/s
Wind
Light Breeze
1.1
UV Index
High
10.8h daylight

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