Turn Point, Boundary Pass tidal current predictions

Now

Ebb 0.6 ktToward SW (236°)

Next slack

10:24 PMPDT

Next max flood

2.2 ktSat 1:48 AM

Next max ebb

1.0 kt8:17 PM

Knots along the channel: above the line the flood, running in toward N (3°); below it the ebb, running out toward SW (236°). Times are Pacific Daylight Time. Today: flood 2.0 kt 1:08 AM, slack 4:50 AM, ebb 2.0 kt 7:56 AM, slack 11:29 AM, flood 1.9 kt 2:45 PM, slack 6:26 PM, ebb 1.0 kt 8:17 PM, slack 10:24 PM.

• Small Craft Advisory Small Craft Advisory issued September 25 at 2:03PM PDT until September 26 at 5:00AM PDT by NWS Seattle WAUntil Sat 5:00 AM
  Full text

  * WHAT...Southwest winds 20 to 30 kt. * WHERE...Northern Inland Waters Including The San Juan Islands. * WHEN...Until 5 AM PDT Saturday. * IMPACTS...Conditions will be hazardous to small craft.

  A Small Craft Advisory means that wind speeds of 21 to 33 knots and/or seas 10 feet or higher are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels should avoid navigating in these conditions.

The flood is the tidal current running in from the sea, the ebb the current running back out. Slack water is the short turn between them, when the current is weakest: the time to cross a strong channel, anchor, or dive. Slack in a channel is not the time of high or low tide; it can come hours after.

Speeds are knots along the channel's main axis, and directions are degrees true toward which the water flows, as NOAA prints its tables. A current against the wind stands the waves up steep and close together.

Predictions are astronomical: the moon and the sun, not the weather. Strong wind, river flow after heavy rain and storm surge all change the real current.

• Johns Island, 0.8 mile north ofSubordinate current station4.4 mi
• Waldron Island, 1.7 nm west ofSubordinate current station6.5 mi
• Haro Strait, 1.2 nm west of Kellett BluffHarmonic current station7.1 mi
• Spieden Channel, north of Limestone PointHarmonic current station7.5 mi
• Skipjack Island, 1.5 miles northwest ofSubordinate current station9.3 mi
• Point Hammond, 1.1 miles northwest ofSubordinate current station10 mi
• President Channel, East of Point DisneyHarmonic current station11 mi
• Spring Passage, south entranceHarmonic current station11 mi

• Tide times at Roche Harbor, San Juan Island 7.0 mi
• Tide times at Hanbury Point, Mosquito Pass, San Juan I 8.3 mi
• Tide times at Waldron Island, Puget Sound 9.5 mi
• Forecast for Friday Harbor, WA
• Open the live map with tidal currents
• All tidal current stations in Washington

Tidal current predictions from NOAA’s Center for Operational Oceanographic Products and Services (CO-OPS), station PUG1717, bin 35: original at NOAA. Marine alerts from the National Weather Service.