Mapu a VaeaMapu a Vaea at a Glance
About Mapu a Vaea
Mapu a Vaea is a group of coastal blowholes on the western side of Tongatapu in Tonga, commonly known in English as the “blowholes at Houma.” It is one of Tonga’s best-known natural coastal features.
The site is visited for dramatic displays of seawater forced through lava-tube cavities that produce towering sprays and loud, trumpet-like sounds on high surf. Walkways and viewing points along the rocky shore allow visitors to watch the blowholes safely from land.
The blowholes formed where ancient lava flows met the sea and were subsequently eroded to form tunnels and vents; they have long been a locally known natural attraction and feature in Tongan coastal geography.
Mapu a Vaea is located on the coast near the village of Houma on the island of Tongatapu, accessible by road from the island’s main town, Nukuʻalofa.
- Blowholes: A line of coastal blowholes formed in lava rock that can drive columnar sprays of seawater into the air when ocean swell is strong.
Best Time to Visit Mapu a Vaea
Visit during dry-season afternoons for the most reliable blowhole activity, though strong seas in the wet season can produce dramatic displays.
Weather & Climate near Mapu a Vaea
Mapu a Vaea's climate is classified as Tropical Rainforest - Tropical Rainforest climate with consistently warm temperatures year-round. Temperatures range from 18°C to 29°C. Abundant rainfall (1763 mm/year), wettest in February.
| Month | Comfort | Temp | Feels | Rain | Sky | Humidity | Wind | UV | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | Very Good | 23° - 29° | 26° | 199 mm | partly cloudy | 82% | 4.2 m/s | 2.9 extreme | 13.1h |
| February | Very Good | 23° - 29° | 26° | 215 mm | partly cloudy | 81% | 4.0 m/s | 2.8 extreme | 12.7h |
| March | Good | 23° - 29° | 26° | 212 mm | overcast | 82% | 4.0 m/s | 2.3 extreme | 12.1h |
| April | Good | 22° - 28° | 25° | 175 mm | overcast | 80% | 4.2 m/s | 1.8 very high | 11.5h |
| May | Very Good | 20° - 26° | 23° | 118 mm | overcast | 79% | 4.1 m/s | 1.3 high | 11.0h |
| June | Very Good | 19° - 26° | 23° | 98 mm | overcast | 78% | 4.2 m/s | 1.0 high | 10.7h |
| July | Very Good | 18° - 25° | 22° | 92 mm | partly cloudy | 77% | 4.2 m/s | 1.1 high | 10.8h |
| August | Very Good | 18° - 25° | 21° | 105 mm | overcast | 78% | 4.2 m/s | 1.4 high | 11.3h |
| September | Very Good | 19° - 25° | 22° | 119 mm | overcast | 79% | 4.2 m/s | 1.8 very high | 11.9h |
| October | Very Good | 19° - 26° | 23° | 119 mm | overcast | 79% | 4.4 m/s | 2.3 extreme | 12.5h |
| November | Very Good | 21° - 27° | 24° | 130 mm | partly cloudy | 80% | 4.2 m/s | 2.6 extreme | 13.0h |
| December | Very Good | 22° - 28° | 25° | 181 mm | partly cloudy | 80% | 4.3 m/s | 2.9 extreme | 13.3h |
How to Get to Mapu a Vaea
Mapu a Vaea is on the western coast of Tongatapu. It is usually reached by car or taxi from Nukuʻalofa (about 20-30 minutes), and local tour operators include it on half-day island tours.
Tips for Visiting Mapu a Vaea
- Arrive midday when the blowholes roar and the spray is at its fullest - mornings can be deceptively calm.
- Wear quick-dry clothing; the spray can reach spectators on windy days.
- Stand behind safety rails - strong surges can throw unexpected water high on the viewing platforms.