Fort Flagler (Marrowstone Island)

Fort Flagler (Marrowstone Island) is a cold-water, wind-sports venue at the northern tip of Marrowstone Island, where strong tides from Admiralty Inlet can dominate the feel of a session. Water is generally described as clean, with conditions ranging from shallow flat-to-chop near the launch areas to deeper water in the nearby channel. Shore break is small, but hazards can include large cobble at low tide and driftwood/logs on the beach and in the water. Wind performance is most associated with North and South directions. Summer months (approximately May through September) are described as the best period, with seasonal winds becoming more consistent and building after late morning—often peaking from early afternoon into the afternoon. Gustiness is generally reported as moderate, with South-wind sessions noted as potentially more gusty than North. Wind reliability is described as moderate overall and can depend on pressure gradients/frontal systems. Kitesurfing is the best-supported sport at this location. Sources describe the water as shallow, flat-to-chop, and suitable for freeride, wave, and freestyle, but the overall challenge level is raised by tidal currents and cold water. There are also strong indications that this spot is more naturally suited to intermediate-to-advanced riders, particularly due to the current risk. If wind drops, the current can carry riders—so tide awareness is essential. Facilities include showers and toilets, with food available on-site/seasonally. Parking requires a Discover Pass. Safety planning is key: check the tide chart, inspect the beach for cobble and driftwood (especially after storms), and avoid shipping/ferry routes. Rescue is not guaranteed on-site, and emergency/medical access is via Port Townsend, so riders should be prepared to self-manage and carry appropriate cold-water gear.