Umatac Bay 55.8
#4026 of 5753 surf spots in the world · 🇬🇺 Guam · Guam · near Agana
Very consistent, wind is the enemy here, peaks in January.
Warm waterBeginner friendlyBeginner
Surf score55.8 /100
Surfable days71% of the year
Clean days7% groundswell + friendly wind
Groundswell8% period 11 s+
Typical size0.8 m 2.6 ft median
Water29°C boardshorts
Best time to surf Umatac Bay
The best time to surf Umatac Bay is January, April, October. It rarely works. In January the water sits around 28°C, so pack boardshorts, and the typical wave is 1.2 m. The nearest airport is GUM (27 km) and the nearest town is Agana (22 km).
| Month | Surfable | Clean | Size | Water | Suit |
|---|---|---|---|---|---|
| Jan | 99% | 16% | 1.2 m | 28°C | boardies |
| Feb | 97% | 9% | 1.1 m | 28°C | boardies |
| Mar | 90% | 6% | 0.8 m | 28°C | boardies |
| Apr | 81% | 12% | 0.7 m | 28°C | boardies |
| May | 35% | 3% | 0.5 m | 29°C | boardies |
| Jun | 19% | 1% | 0.5 m | 30°C | boardies |
| Jul | 41% | 0% | 0.6 m | 29°C | boardies |
| Aug | 50% | 4% | 0.6 m | 29°C | boardies |
| Sep | 73% | 7% | 1.0 m | 30°C | boardies |
| Oct | 82% | 15% | 0.9 m | 30°C | boardies |
| Nov | 91% | 7% | 0.8 m | 29°C | boardies |
| Dec | 95% | 6% | 0.9 m | 29°C | boardies |
Why 55.8
Seven parts, each normalised 0 to 1 and weighted; the sum is scaled so the best spot in the world is 100.
Consistency 26%
21.2
Clean days 24%
3.8
Groundswell 12%
1.2
Season spread 10%
7.3
Wave size 8%
1.2
Water comfort 10%
10.0
Access 10%
9.6
The detail
Faces 260° with 47% open water around it. Friendly morning wind 93% of days. Mean peak period 8.9 s. Days over 3 m: 0%. Mellow days (0.4 to 1.2 m): 70%. Months that work: 9 of 12. Coordinates 13.297, 144.659 (OpenStreetMap).
Spots nearby
Talafofo Bay🇬🇺 Guam · score 61.6Pickop's Point🇬🇺 Guam · score 62.0Gab Gab Beach🇬🇺 Guam · score 67.9Magandas Reef🇬🇺 Guam · score 64.0
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