Ise tide times

Predictions: Open-Meteo Marine (MeteoFrance SMOC, 0.08° grid) — heights relative to MSL (not chart datum / LAT). Model-derived.

Model-derived from a global ocean grid. Useful indication; expect about ±45 minutes on average vs. a local harmonic gauge, individual stations vary widely. See /methodology for per-region detail. Not for navigation.

Conditions as of 08:00 local time. Refreshes daily.

Predictions: Open-Meteo Marine (MeteoFrance SMOC, 0.08° grid) — heights relative to MSL (not chart datum / LAT). Model-derived. · Not for navigation.

The angler tradition for major/minor fishing windows: major ≈3-hour windows around moon transit and opposition; minor ≈2-hour windows around moonrise and moonset. Times are Asia/Tokyo local. Folk tradition, not a scientific forecast.

Next spring tide on Sun 17 May (range 2.1m). Next neap on Thu 14 May.

Spring tides cluster around new and full moons (biggest swings). Neap tides land on quarter moons (smallest swings). See the spring tide and neap tide glossary entries for the why.

Ise is a small city of 120,000 on the western shore of Ise Bay in Mie Prefecture, famous primarily for the Jingū — the Grand Shrine complex comprising the outer Geku (Toyouke Daijingū) and inner Naikū (Kōtai Jingū) shrines, the holiest site in Shinto and the ritual centre of the imperial family. The Naikū shrine sits above the Isuzu River 5 km southeast of the city centre, in a forest of ancient Japanese cypress. The coastal zone at Ise is defined by the intersection of the sacred and the tidal: the ama divers who have worked these waters for over two millennia are linked directly to the shrine culture that made Ise famous. The tidal regime at Ise is semidiurnal with a spring range of approximately 2.0 m above Chart Datum. Mean high water springs is around 1.5 m; mean low water springs around 0.5 m. Neap range narrows to 0.8–1.0 m. Ise Bay is a semi-enclosed embayment roughly 60 km north-south and 35 km east-west; the tidal wave enters through the bay mouth between the Atsumi Peninsula and Cape Daio. The bay head — where Ise and Tsu sit — sees slightly amplified tidal range due to the resonance geometry of the enclosed water body. The ama (海女) tradition at Ise-Shima is the most historically significant human interaction with the tidal zone in this region. Ama are breath-hold divers, almost exclusively women, who harvest abalone (awabi), turban shells (sazae), and sea urchin (uni) from the rocky subtidal and intertidal zones. Active ama communities still operate at Toba (20 km south of Ise) and at several points on the Shima Peninsula. Diving operations are strongly tidal: the most productive sessions are on the lower half of the ebb and the flood, when current is manageable and the rocky intertidal offers the best access to abalone habitat. For visitors to the Naikū shrine, the Isuzu River running through the shrine precincts is tidal up to approximately 1.5 km from the bay. At spring high water, the river level rises 1.8–2.0 m above its low-water mark. The river has been the ritual purification site for shrine visitors for centuries; the water is clear and fast-running even at spring tide due to the current from upstream. Sea fishing from Ise Bay targets sea bream (madai) on the reef structures around the bay-mouth islands, flounder and mullet on the inner bay flats, and spiny lobster (ise-ebi) in the rocky subtidal of the Shima Peninsula. The ise-ebi is the premium product of this coast and is regulated with season and gear restrictions. For boat operators transiting Ise Bay, the bay-mouth passage between the Atsumi Peninsula and Cape Daio carries 1.5–2.5 knots of current on springs. Passages across the bay to Toba or Nagoya are straightforward in moderate weather but the bay can become rough in strong southerly wind, when swell refracts around the Shima Peninsula and creates confused seas. All tide predictions for Ise come from the Open-Meteo Marine gridded model. Timing accuracy is ±45 minutes; height accuracy is ±0.3 m above Chart Datum.