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AK Turnagain Arm Boretide - Surfing


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Lat: 60.938271
Lng: -149.166870


Marker owner: dnorris



Average user rating for this marker: 4

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Marker Description: Turnagain Arm Boretide wave offers a 5-mile ride. The wave is formed in  Alaska’s Turnagain Arm near Girdwood, Alaska, 40 miles south-east of Anchorage. There Cook Inlet, east of Anchorage, extends inland and splits into the Turnagain Arm and the Knik Arm. The Turnagain Arm runs east/west and is 10 miles wide, narrowing to almost nothing over the course of 40 miles where it meets Twentymile River.

Stand Up paddlers can ride the bore at large tides, which generates when the outgoing current meets the incoming tide. When the low tide is entering the narrower part of the Arm at mile marker 104 and 103 of the Seward Highway. The tide gains speed and forms into 8-10 parallel waves, typically about 1-1/2 hours after Anchorage's low tide.

It's one of the world's biggest bore tides and can be between 2 feet up to head high, but often it's much smaller, and with a Stand Up Paddle board chances of catching it are maximized. Surprisingly enough, the water temperature at TA is reasonably warm: 8°-12°C (47-53°F) in September, when these shots were taken. However, currently the water is -1.0°C (30°F), but hey, that's only 3 degrees colder than our river wave! But no, you wouldn't want to ride the wave at this time of the year,  as there is too much ice in the Turnagain Arm in the winter, and also very little water at low tide since the rivers are mostly

Apart from that, Turnagain Arm bore wave is the only one that occurs in the far north and the only one bordered by mountains, making it the most unique and most geologically dramatic bore tide.

March and September around the full moon will create the biggest waves and best temperature to surf.

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