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Grandma's 75.1
#2203 of 5753 surf spots in the world · 🇺🇸 United States of America · Hawaii · near Wailuku
Very consistent, no off season, gentle enough to learn.
Works all yearWarm waterBeginner friendlyBeginner
Surf score75.1 /100
Surfable days80% of the year
Clean days24% groundswell + friendly wind
Groundswell24% period 11 s+
Typical size0.8 m 2.5 ft median
Water26°C boardshorts
Best time to surf Grandma's
The best time to surf Grandma's is January, November, December. The season runs Dec to Jan. In January the water sits around 25°C, so pack a rash vest or 2 mm, and the typical wave is 1.0 m. The nearest airport is OGG (17 km) and the nearest town is Wailuku (13 km).
| Month | Surfable | Clean | Size | Water | Suit |
|---|---|---|---|---|---|
| Jan | 97% | 54% | 1.0 m | 25°C | vest |
| Feb | 89% | 30% | 0.9 m | 24°C | vest |
| Mar | 92% | 31% | 0.9 m | 24°C | vest |
| Apr | 80% | 23% | 0.8 m | 24°C | vest |
| May | 63% | 12% | 0.7 m | 25°C | boardies |
| Jun | 71% | 11% | 0.7 m | 26°C | boardies |
| Jul | 89% | 12% | 0.7 m | 26°C | boardies |
| Aug | 66% | 5% | 0.7 m | 27°C | boardies |
| Sep | 55% | 1% | 0.6 m | 27°C | boardies |
| Oct | 79% | 23% | 0.7 m | 26°C | boardies |
| Nov | 87% | 35% | 0.8 m | 26°C | boardies |
| Dec | 96% | 46% | 0.9 m | 25°C | boardies |
Why 75.1
Seven parts, each normalised 0 to 1 and weighted; the sum is scaled so the best spot in the world is 100.
Consistency 26%
24.4
Clean days 24%
14.2
Groundswell 12%
4.6
Season spread 10%
10.0
Wave size 8%
1.1
Water comfort 10%
8.9
Access 10%
9.9
The detail
Faces 195° with 33% open water around it. Friendly morning wind 98% of days. Mean peak period 10.7 s. Days over 3 m: 0%. Mellow days (0.4 to 1.2 m): 88%. Months that work: 12 of 12. Coordinates 20.789, -156.557 (OpenStreetMap).
Spots nearby
Ma'alaea - Freight trains🇺🇸 United States of America · score 56.3Olowalu🇺🇸 United States of America · score 83.1Launiupoko Beach Park🇺🇸 United States of America · score 83.3Kihei Cove🇺🇸 United States of America · score 73.5
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