Diamond Head tidal current predictions

Now

Ebb 0.2 ktToward E (97°)

Next slack

10:15 PMHST

Next max flood

0.7 ktSat 3:49 AM

Next max ebb

0.2 kt7:56 PM

Knots along the channel: above the line the flood, running in toward W (274°); below it the ebb, running out toward E (97°). Times are Hawaii-Aleutian Standard Time. Today: flood 0.6 kt 3:03 AM, slack 5:07 AM, ebb 1.0 kt 8:17 AM, slack 1:28 PM, flood 0.6 kt 3:59 PM, slack 6:27 PM, ebb 0.2 kt 7:56 PM, slack 10:15 PM.

• Gale Watch Gale Watch issued September 25 at 2:17PM HST until September 27 at 6:00PM HST by NWS Honolulu HIUntil Sun 6:00 PM
  Full text

  * WHAT...For the Small Craft Advisory, east winds 20 to 30 kt with gusts up to 35 kt and seas 8 to 13 feet. For the Gale Watch, east winds 25 to 35 kt with gusts up to 45 kt and seas 11 to 15 feet possible. * WHERE...Kauai Northwest Waters, Kauai Windward Waters, Kauai Leeward Waters, Kauai Channel, Oahu Windward Waters and Oahu Leeward Waters. * WHEN...For the Small Craft Advisory, until 6 PM HST Saturday. For the Gale Watch, from Saturday evening through Sunday afternoon. * IMPACTS...Strong winds can cause hazardous seas which could capsize or damage vessels and reduce visibility.

  A Gale Watch is issued when the risk of gale force winds of 34 to 47 knots has significantly increased but the specific timing and/or location is still uncertain. It is intended to provide additional lead time for mariners who may wish to consider altering their plans.

• Small Craft Advisory Small Craft Advisory issued September 25 at 2:17PM HST until September 26 at 6:00PM HST by NWS Honolulu HIUntil Sat 6:00 PM
  Full text

  * WHAT...For the Small Craft Advisory, east winds 20 to 30 kt with gusts up to 35 kt and seas 8 to 13 feet. For the Gale Watch, east winds 25 to 35 kt with gusts up to 45 kt and seas 11 to 15 feet possible. * WHERE...Kauai Northwest Waters, Kauai Windward Waters, Kauai Leeward Waters, Kauai Channel, Oahu Windward Waters and Oahu Leeward Waters. * WHEN...For the Small Craft Advisory, until 6 PM HST Saturday. For the Gale Watch, from Saturday evening through Sunday afternoon. * IMPACTS...Strong winds can cause hazardous seas which could capsize or damage vessels and reduce visibility.

  A Gale Watch is issued when the risk of gale force winds of 34 to 47 knots has significantly increased but the specific timing and/or location is still uncertain. It is intended to provide additional lead time for mariners who may wish to consider altering their plans.

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.

• Iroquois Point, Pearl HarborHarmonic current station12 mi
• Makapu'u PointHarmonic current station13 mi
• South of Barbers PointHarmonic current station19 mi
• Barbers Point EntranceHarmonic current station22 mi

• Tide times at Honolulu 5.8 mi
• Tide times at Hanauma Bay 7.4 mi
• Tide times at Waimanalo 9.8 mi
• Forecast for Diamond Head, HI
• Open the live map with tidal currents
• All tidal current stations in Hawaii

Tidal current predictions from NOAA’s Center for Operational Oceanographic Products and Services (CO-OPS), station HAI1106, bin 26: original at NOAA. Marine alerts from the National Weather Service.