Harbor Island, Aransas Channel tidal current predictions
Flooding 0.3 kt now, toward NNW (345°), easing. Slack at 8:25 AM, then ebb to 0.6 kt at 11:37 AM.
Now
Today, Fri, Oct 2, at 11 ft deep.
- Now
- Flood 0.3 ktToward NNW (345°)
- Next slack
- 8:25 AMCDT
- Next max flood
- 1.6 ktSat 12:37 AM
- Next max ebb
- 0.6 kt11:37 AM
Knots along the channel: above the line the flood, running in toward NNW (345°); below it the ebb, running out toward SSE (160°). Times are Central Daylight Time. Today: slack 8:25 AM, ebb 0.6 kt 11:37 AM, ebb 0.4 kt 3:58 PM, ebb 0.4 kt 5:37 PM, slack 7:48 PM.
Alerts in force
National Weather Service marine and coastal products at this station’s position.
None right now. The National Weather Service issues small craft advisories, gale and storm warnings, special marine warnings, dense fog advisories and coastal flood products for water like this.
7-day current table
Strongest flood this week 2.0 kt, Tue, Oct 6 at 3:22 AM. Strongest ebb 1.0 kt, Tue, Oct 6 at 4:42 PM.
| Time | Event | Speed | Toward |
|---|---|---|---|
| Fri, Oct 2 | |||
| 8:25 AM | Slack water | ||
| 11:37 AM | Maximum ebb | 0.6 kt | SSE (160°) |
| 3:58 PM | Maximum ebb | 0.4 kt | SSE (160°) |
| 5:37 PM | Maximum ebb | 0.4 kt | SSE (160°) |
| 7:48 PM | Slack water | ||
| Sat, Oct 3 | |||
| 12:37 AM | Maximum flood | 1.6 kt | NNW (345°) |
| 9:05 AM | Slack water | ||
| 12:49 PM | Maximum ebb | 0.7 kt | SSE (160°) |
| 4:45 PM | Maximum ebb | 0.4 kt | SSE (160°) |
| 6:37 PM | Maximum ebb | 0.5 kt | SSE (160°) |
| 8:53 PM | Slack water | ||
| Sun, Oct 4 | |||
| 1:47 AM | Maximum flood | 1.8 kt | NNW (345°) |
| 9:44 AM | Slack water | ||
| 2:06 PM | Maximum ebb | 0.8 kt | SSE (160°) |
| 9:37 PM | Slack water | ||
| Mon, Oct 5 | |||
| 2:42 AM | Maximum flood | 2.0 kt | NNW (345°) |
| 10:28 AM | Slack water | ||
| 3:16 PM | Maximum ebb | 1.0 kt | SSE (160°) |
| 10:10 PM | Slack water | ||
| Tue, Oct 6 | |||
| 3:22 AM | Maximum flood | 2.0 kt | NNW (345°) |
| 11:33 AM | Slack water | ||
| 4:42 PM | Maximum ebb | 1.0 kt | SSE (160°) |
| 10:42 PM | Slack water | ||
| Wed, Oct 7 | |||
| 3:51 AM | Maximum flood | 1.9 kt | NNW (345°) |
| 1:40 PM | Slack water | ||
| 6:19 PM | Maximum ebb | 0.8 kt | SSE (160°) |
| 11:18 PM | Slack water | ||
| Thu, Oct 8 | |||
| 4:11 AM | Maximum flood | 1.4 kt | NNW (345°) |
| 11:29 AM | Maximum flood | 0.3 kt | NNW (345°) |
| 2:10 PM | Maximum flood | 0.5 kt | NNW (345°) |
| 4:53 PM | Slack water | ||
| 7:51 PM | Maximum ebb | 0.5 kt | SSE (160°) |
Measured current, last 24 hours
Latest: 0.4 kt toward NNW (328°) at 7:15 AM.
- Measured, along the channel
- Predicted
A NOAA PORTS current meter, bin 30. Wind, river flow and storm surge push the real current off the prediction; the meter measures the difference.
What this means
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.
Nearby5
The closest other NOAA current stations, nearest first.
More for this place
Sources
Tidal current predictions and real-time current measurements (PORTS) from NOAA’s Center for Operational Oceanographic Products and Services (CO-OPS), station cc0501, bin 12: original at NOAA. Marine alerts from the National Weather Service.