National City tidal current predictions
Flooding 0.2 kt now, toward SSE (166°), building. Maximum flood 0.6 kt at 8:13 AM.
Now
Today, Tue, Sep 29, at depth not given.
- Now
- Flood 0.2 ktToward SSE (166°)
- Next slack
- 11:17 AMPDT
- Next max flood
- 0.6 kt8:13 AM
- Next max ebb
- 0.9 kt3:43 PM
Knots along the channel: above the line the flood, running in toward SSE (166°); below it the ebb, running out toward N (2°). Times are Pacific Daylight Time. Today: ebb 0.6 kt 3:17 AM, slack 5:33 AM, flood 0.6 kt 8:13 AM, slack 11:17 AM, ebb 0.9 kt 3:43 PM, slack 6:47 PM, flood 0.5 kt 9:13 PM.
Alerts in force1
National Weather Service marine and coastal products at this station’s position.
- Coastal Flood Advisory Coastal Flood Advisory issued September 29 at 1:59AM PDT until September 30 at 5:00PM PDT by NWS San Diego CAUntil Wed 5:00 PM
Full text
* WHAT...Minor coastal flooding expected due to the combination of high tides and elevated surf. * WHERE...San Diego County Coastal Areas and Orange County Coastal Areas. * WHEN...Until 5 PM PDT Wednesday. * IMPACTS...Minor coastal flooding and minor coastal erosion expected during high tides. Additionally, elevated surf will lead to strong rip currents. * ADDITIONAL DETAILS...Elevated surf of 2-4 feet with local sets to 5 feet on south-facing beaches. Morning high tides are expected to peak between 6.8 and 7.1 feet during the late mornings between 10 AM and noon through Wednesday. These tide predictions have been corrected to reflect current trends in observed tide observations.
If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property.
7-day current table
Strongest flood this week 0.6 kt, Tue, Sep 29 at 8:13 AM. Strongest ebb 0.9 kt, Tue, Sep 29 at 3:43 PM.
| Time | Event | Speed | Toward |
|---|---|---|---|
| Tue, Sep 29 | |||
| 3:17 AM | Maximum ebb | 0.6 kt | N (2°) |
| 5:33 AM | Slack water | ||
| 8:13 AM | Maximum flood | 0.6 kt | SSE (166°) |
| 11:17 AM | Slack water | ||
| 3:43 PM | Maximum ebb | 0.9 kt | N (2°) |
| 6:47 PM | Slack water | ||
| 9:13 PM | Maximum flood | 0.5 kt | SSE (166°) |
| Wed, Sep 30 | |||
| 12:27 AM | Slack water | ||
| 3:59 AM | Maximum ebb | 0.4 kt | N (2°) |
| 6:02 AM | Slack water | ||
| 8:46 AM | Maximum flood | 0.6 kt | SSE (166°) |
| 11:53 AM | Slack water | ||
| 4:32 PM | Maximum ebb | 0.8 kt | N (2°) |
| 7:50 PM | Slack water | ||
| 10:13 PM | Maximum flood | 0.4 kt | SSE (166°) |
| Thu, Oct 1 | |||
| 1:39 AM | Slack water | ||
| 4:51 AM | Maximum ebb | 0.2 kt | N (2°) |
| 6:35 AM | Slack water | ||
| 9:27 AM | Maximum flood | 0.4 kt | SSE (166°) |
| 12:39 PM | Slack water | ||
| 5:35 PM | Maximum ebb | 0.7 kt | N (2°) |
| 9:14 PM | Slack water | ||
| 11:54 PM | Maximum flood | 0.3 kt | SSE (166°) |
| Fri, Oct 2 | |||
| 3:36 AM | Slack water | ||
| 6:09 AM | Maximum ebb | 0.1 kt | N (2°) |
| 7:22 AM | Slack water | ||
| 10:29 AM | Maximum flood | 0.3 kt | SSE (166°) |
| 1:47 PM | Slack water | ||
| 7:00 PM | Maximum ebb | 0.6 kt | N (2°) |
| 11:01 PM | Slack water | ||
| Sat, Oct 3 | |||
| 2:06 AM | Maximum flood | 0.3 kt | SSE (166°) |
| 5:49 AM | Slack water | ||
| 9:16 AM | Slack water | ||
| 12:50 PM | Maximum flood | 0.2 kt | SSE (166°) |
| 3:32 PM | Slack water | ||
| 8:39 PM | Maximum ebb | 0.6 kt | N (2°) |
| Sun, Oct 4 | |||
| 12:28 AM | Slack water | ||
| 3:25 AM | Maximum flood | 0.5 kt | SSE (166°) |
| 6:51 AM | Slack water | ||
| 9:51 AM | Maximum ebb | 0.2 kt | N (2°) |
| 11:55 AM | Slack water | ||
| 2:51 PM | Maximum flood | 0.3 kt | SSE (166°) |
| 5:15 PM | Slack water | ||
| 9:59 PM | Maximum ebb | 0.7 kt | N (2°) |
| Mon, Oct 5 | |||
| 1:26 AM | Slack water | ||
| 4:17 AM | Maximum flood | 0.6 kt | SSE (166°) |
| 7:29 AM | Slack water | ||
| 10:53 AM | Maximum ebb | 0.4 kt | N (2°) |
| 1:16 PM | Slack water | ||
| 4:00 PM | Maximum flood | 0.5 kt | SSE (166°) |
| 6:31 PM | Slack water | ||
| 10:59 PM | Maximum ebb | 0.8 kt | N (2°) |
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. This is a subordinate station: NOAA predicts it from a nearby harmonic station by fixed corrections to the times and speeds of its slack waters and maxima, so the curve between them is less exact.
Nearby8
The closest other NOAA current stations, nearest first.
- Sweetwater Channel, southwest ofSubordinate current station
- National City, WSW of Pier 12Subordinate current station
- 28th St. Pier (San Diego), 0.92 nmi. SWSubordinate current station
- 28th St. Pier (San Diego), 0.35 nmi. SWSubordinate current station
- Coronado, off northeast endSubordinate current station
- G St. Pier (San Diego), 0.22 nmi. SW ofSubordinate current station
- San Diego, 0.5 mile west ofSubordinate current station
- Point Loma Light, 0.8 nmi. east ofSubordinate current station
More for this place
Sources
Tidal current predictions from NOAA’s Center for Operational Oceanographic Products and Services (CO-OPS), station PCT0106, bin 1: original at NOAA. Marine alerts from the National Weather Service.