Delaware Tide Charts
Worldwide Tides

King tides at Port Mahon

The highest predicted waters at Port Mahon, through 2030. Every high tide reaching 7.0 ft above MLLW.

What counts as a king tide

There is no official definition. NOAA does not publish one, and the California King Tides Project simply means the highest predicted tides of the year. This page lists every predicted high water of 7.0 ft or more above MLLW, which on this stretch of coast picks out the handful of days each winter when the water comes up unusually far.

They happen when the moon is closest to Earth and new or full at the same time, with the Earth near its own closest approach to the sun. That alignment stacks the solar and lunar pulls together, and it lands in November, December and January far more often than not.

These are predictions of astronomical tide only. A winter storm arriving on a king tide is what causes flooding, because surge and wind can add a foot or more on top of the figures here.

King tides still to come

2–6 July 2027

Date High water Height
2 JulFri8:34 am4.9 ft
2 JulFri8:56 pm6.6 ft
3 JulSat9:31 am5.1 ft
3 JulSat9:50 pm6.8 ft
4 JulSun10:25 am5.3 ft
4 JulSun10:43 pm6.9 ft
5 JulMon11:19 am5.5 ft
5 JulMon11:36 pm6.9 ft
6 JulTue12:11 pm5.6 ft

31 July – 4 August 2027

Date High water Height
31 JulSat8:17 am4.9 ft
31 JulSat8:39 pm6.7 ft
1 AugSun9:14 am5.3 ft
1 AugSun9:35 pm6.9 ft
2 AugMon10:09 am5.6 ft
2 AugMon10:28 pm7.0 ft
3 AugTue11:01 am5.9 ft
3 AugTue11:19 pm6.9 ft
4 AugWed11:51 am6.1 ft

29 August – 2 September 2027

Date High water Height
29 AugSun8:02 am5.2 ft
29 AugSun8:23 pm6.7 ft
30 AugMon8:57 am5.7 ft
30 AugMon9:17 pm6.9 ft
31 AugTue9:49 am6.1 ft
31 AugTue10:08 pm6.9 ft
1 SepWed10:38 am6.4 ft
1 SepWed10:57 pm6.7 ft
2 SepThu11:26 am6.6 ft
2 SepThu11:44 pm6.4 ft

7–11 April 2028

Date High water Height
7 AprFri8:27 am6.2 ft
7 AprFri8:57 pm6.4 ft
8 AprSat9:19 am6.2 ft
8 AprSat9:45 pm6.8 ft
9 AprSun10:08 am6.1 ft
9 AprSun10:32 pm6.9 ft
10 AprMon10:56 am5.9 ft
10 AprMon11:18 pm6.9 ft
11 AprTue11:43 am5.6 ft

18–22 September 2028

Date High water Height
18 SepMon9:39 am6.6 ft
18 SepMon10:00 pm6.8 ft
19 SepTue10:28 am6.9 ft
19 SepTue10:49 pm6.6 ft
20 SepWed11:16 am7.0 ft
20 SepWed11:38 pm6.3 ft
21 SepThu12:04 pm7.0 ft
22 SepFri12:27 am5.9 ft
22 SepFri12:54 pm6.7 ft

17–21 October 2028

Date High water Height
17 OctTue9:15 am6.8 ft
17 OctTue9:38 pm6.3 ft
18 OctWed10:03 am7.1 ft
18 OctWed10:28 pm6.1 ft
19 OctThu10:52 am7.1 ft
19 OctThu11:17 pm5.9 ft
20 OctFri11:40 am6.9 ft
21 OctSat12:06 am5.6 ft
21 OctSat12:29 pm6.6 ft

26–30 April 2029

Date High water Height
26 AprThu8:17 am6.0 ft
26 AprThu8:46 pm6.7 ft
27 AprFri9:10 am6.0 ft
27 AprFri9:36 pm7.0 ft
28 AprSat10:03 am5.9 ft
28 AprSat10:26 pm7.1 ft
29 AprSun10:54 am5.8 ft
29 AprSun11:16 pm7.1 ft
30 AprMon11:45 am5.6 ft

7–11 October 2029

Date High water Height
7 OctSun9:31 am6.8 ft
7 OctSun9:53 pm6.4 ft
8 OctMon10:19 am7.0 ft
8 OctMon10:42 pm6.3 ft
9 OctTue11:07 am7.1 ft
9 OctTue11:32 pm6.1 ft
10 OctWed11:57 am7.0 ft
11 OctThu12:24 am5.7 ft
11 OctThu12:49 pm6.8 ft

4–8 November 2029

Date High water Height
4 NovSun7:16 am6.6 ft
4 NovSun7:40 pm6.0 ft
5 NovMon8:06 am6.9 ft
5 NovMon8:32 pm6.0 ft
6 NovTue8:57 am7.1 ft
6 NovTue9:24 pm5.9 ft
7 NovWed9:47 am7.1 ft
7 NovWed10:16 pm5.7 ft
8 NovThu10:39 am6.9 ft
8 NovThu11:08 pm5.5 ft

17–21 April 2030

Date High water Height
17 AprWed9:30 am6.0 ft
17 AprWed9:55 pm6.8 ft
18 AprThu10:19 am6.0 ft
18 AprThu10:43 pm7.0 ft
19 AprFri11:09 am5.9 ft
19 AprFri11:31 pm7.0 ft
20 AprSat12:00 pm5.7 ft
21 AprSun12:22 am6.9 ft
21 AprSun12:53 pm5.4 ft

15–19 May 2030

Date High water Height
15 MayWed8:13 am5.6 ft
15 MayWed8:41 pm6.7 ft
16 MayThu9:07 am5.7 ft
16 MayThu9:32 pm7.0 ft
17 MayFri10:00 am5.7 ft
17 MayFri10:24 pm7.1 ft
18 MaySat10:54 am5.7 ft
18 MaySat11:15 pm7.1 ft
19 MaySun11:47 am5.6 ft

13–17 June 2030

Date High water Height
13 JunThu7:50 am5.3 ft
13 JunThu8:19 pm6.7 ft
14 JunFri8:48 am5.4 ft
14 JunFri9:14 pm6.9 ft
15 JunSat9:45 am5.4 ft
15 JunSat10:08 pm7.0 ft
16 JunSun10:40 am5.5 ft
16 JunSun11:01 pm7.0 ft
17 JunMon11:34 am5.6 ft
17 JunMon11:53 pm6.8 ft

King tides already past

16–20 April 2026

Date High water Height
16 AprThu9:20 am5.9 ft
16 AprThu9:43 pm6.5 ft
17 AprFri10:06 am5.8 ft
17 AprFri10:27 pm6.8 ft
18 AprSat10:53 am5.7 ft
18 AprSat11:12 pm6.9 ft
19 AprSun11:42 am5.5 ft
20 AprMon12:00 am6.8 ft
20 AprMon12:33 pm5.3 ft

15–19 May 2026

Date High water Height
15 MayFri8:53 am5.5 ft
15 MayFri9:15 pm6.8 ft
16 MaySat9:44 am5.5 ft
16 MaySat10:04 pm7.0 ft
17 MaySun10:37 am5.4 ft
17 MaySun10:55 pm7.0 ft
18 MayMon11:30 am5.3 ft
18 MayMon11:47 pm6.9 ft
19 MayTue12:24 pm5.2 ft

13–17 June 2026

Date High water Height
13 JunSat8:30 am5.1 ft
13 JunSat8:53 pm6.8 ft
14 JunSun9:27 am5.2 ft
14 JunSun9:47 pm6.9 ft
15 JunMon10:23 am5.2 ft
15 JunMon10:42 pm7.0 ft
16 JunTue11:18 am5.3 ft
16 JunTue11:36 pm6.9 ft
17 JunWed12:13 pm5.3 ft