Half Tide Rock
Dive site · United States
Advanced divers and up
Is it worth the trip?
63Good out of 100 for your dates
5 days tie for best
Wed 4 · 63 out of 100
- Sea
- 0.2 mflat
- Wind
- 7 kn
- Gusts
- 12kn
- Air
- 24°C
Thu 5 · 63 out of 100
- Sea
- 0.2 mflat
- Wind
- 7 kn
- Gusts
- 13kn
- Air
- 23°C
Fri 6 · 63 out of 100
- Sea
- 0.2 mflat
- Wind
- 6 kn
- Gusts
- 11kn
- Air
- 19°C
Sat 7 · 63 out of 100
- Sea
- 0.2 mflat
- Wind
- 4 kn
- Gusts
- 16kn
- Air
- 15°C
Sun 8 · 63 out of 100
- Sea
- 0.3 m
- Wind
- 3 kn
- Gusts
- 13kn
- Air
- 13°C
Mon 9 · 61 out of 100
- Sea
- 0.4 m
- Wind
- 7 kn
- Gusts
- 22kn
- Air
- 15°C
Tue 10 · 61 out of 100
- Sea
- 0.3 m
- Wind
- 10 kn
- Gusts
- 22knboats in
- Air
- 13°C
Tap a day for sea, wind and water. Full forecast
Forecast: next 9 days
Full forecast- Tue 364, good
- Wed 463, good
- Thu 563, good
- Fri 663, good
- Sat 763, good
- Sun 863, good
- Mon 961, good
- Tue 1061, good
- Wed 1162, good
The site in five facts
- Down to 10 mits deepest
- From a boathow you get in
- Advancedand up
- Water 11 °C7 mm semi-dry or a drysuit
- Faces Wswell from there reaches it
Full forecast
every day, every number
The score doesn't know currents, the visibility on the day or your certification.
Suits Advanced divers and up, as a dive guide states it. Scored for Advanced divers.
| Day | Score | Sea | Wind | Gusts | Air |
|---|---|---|---|---|---|
| Tue 3Nov | 64, good | 0.1 mflat | 2 kn | 8kn | 22°C |
| Wed 4Nov | 63, good | 0.2 mflat | 7 kn | 12kn | 24°C |
| Thu 5Nov | 63, good | 0.2 mflat | 7 kn | 13kn | 23°C |
| Fri 6Nov | 63, good | 0.2 mflat | 6 kn | 11kn | 19°C |
| Sat 7Nov | 63, good | 0.2 mflat | 4 kn | 16kn | 15°C |
| Sun 8Nov | 63, good | 0.3 m | 3 kn | 13kn | 13°C |
| Mon 9Nov | 61, good | 0.4 m | 7 kn | 22kn | 15°C |
| Tue 10Nov | 61, good | 0.3 m | 10 kn | 22knboats in | 13°C |
| Wed 11Nov | 62, good | 0.2 mflat | 8 kn | 15kn | 9°C |
Sea is the waves near the site, in metres; wind and gusts in knots. "Boats in": gusts that keep dive boats in. More
Tide
- Tue 3 NovHigh 05:46 +1.3 mLow 11:47 −1.2 mHigh 18:06 +1.5 m
- Wed 4 NovLow 00:24 −1.5 mHigh 06:46 +1.4 mLow 12:51 −1.3 mHigh 19:09 +1.4 m
- Thu 5 NovLow 01:21 −1.4 mHigh 07:41 +1.5 mLow 13:51 −1.4 mHigh 20:07 +1.4 m
Local clock times; heights about mean sea level. On open coasts the times are usually within a quarter of an hour; in bays, estuaries and on the Gulf of Mexico they can be an hour or more out. Slack water, the safest time to dive where there is current, is about half an hour either side of each high and low. Tide: EOT20 global ocean tide model, Hart-Davis et al. 2021, DGFI-TUM (doi:10.17882/79489), CC BY 4.0. Times and heights computed by us. A model, not a tide table: check a local table before you go.
Forecast updated . It refreshes every three hours. Forecast data: ECMWF, DWD, Météo-France and NOAA, served by Open-Meteo.com (CC BY 4.0). Changed by us. Generated using E.U. Copernicus Marine Service Information.
Map
the site and its town
Half Tide Rock on Google Maps · Directions
Each place wears its best day on these dates: green good, amber fair, pale red poor, as the key says.
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One finger scrolls the page; two fingers move the map. Pins are our own positions. Map OpenFreeMap, © OpenMapTiles, data © OpenStreetMap contributors.
More diving near here
3 places
- Bass Rock 3.2 km away
- Ada K. Damon 3.9 km away
- Bar Rock 4.3 km away
About
the place in full, sources, credits
About Half Tide Rock
A reef dive. It goes down to 10 m. You get in from a boat. It suits Advanced divers and up, as a dive guide states it. The coast faces W: swell from the W reaches it, and wind from the E blows out to sea. No dive centre within 10 km, the nearest 21 km away. The sea is about 5°C in February, its coldest month (drysuit), and 19°C in July, its warmest (7 mm wetsuit and hood). The town to stay in is Ipswich. Within 5 km we also list 3 dive sites and 1 kayak spot.
- What it is Reef.
- How deep Down to 10 m.
- Getting in From a boat.
- Who it suits Suits Advanced divers and up, as a dive guide states it.
- Dive centres No dive centre within 10 km, the nearest 21 km away.
Water about 11°C: 7 mm semi-dry or a drysuit. Typical sea temperature for the time of year, not a forecast.
Visibility under 5 m. Typical for the time of year, estimated from ten years of NASA satellite water clarity, not a forecast. Clearest in Jan, Feb and Mar (under 5 m).
The score is the conditions only: the journey, the price and the partners never change it (how we score, how we earn).
Rough cost (estimate): about US$906–US$1,650 each
about US$906–US$1,650 each · 6 nights, 2 sharing: flights, taxi, stay, food.
Our estimate from typical public prices, not a quote: check the real prices before you book (where they come from). Prices are about, in US Dollar (USD): our pound figures at the European Central Bank's rate of 2 November 2026.
How we worked it out
| What | How we worked it out | Each |
|---|---|---|
| Flights | return MDW to BOS, estimated from distance and season, 1 airline on the route, with a hold bag | about US$168–US$356 |
| Taxi | airport and back, shared | about US$94–US$154 |
| Stay | 6 nights, a mid-range double, shared | about US$302–US$503 |
| Food | 7 days eating out | about US$342–US$637 |
| Total | about US$906–US$1,650 |
Guided dives are not priced yet: we have no sourced price, so it is not in it. Prices from public sources, checked in 2026.
Where to stay: Ipswich
Ad Links marked Ad may pay us if you book. You pay the same, and they never change a score. How we earn
about 10 min by car · 6 places to stay
about US$114/nightcountry average
About Ipswich its beds, food and every spot near it
About US$114 a night is our estimate of the country's average 2-star double room that month: not each town's price, and not a quote. Drives are estimates. Prices are about, in US Dollar (USD): our pound figures at the European Central Bank's rate of 2 November 2026.
Getting there: about 5h 15m
About 5h 15m door to door from Chicago
Fly MDW → BOS, direct, then 1h by road
Flights MDW → BOS on your dates · AviasalesAd
An estimate, one way; the journey never changes the score.
In the water
Dives and courses in Ipswich · GetYourGuideDive gear hire in Ipswich · GetYourGuide
Dive centres nearby
Undersea Divers 21 km
The nearest named dive centres and shops within 25 km, in a straight line; training agencies where the map states them. Listings, not a recommendation. Dive centres: © OpenStreetMap contributors (ODbL). Credits
What you might see
Too few records at this site itself, so these are the animals divers and surveys have recorded at other sites within 25 km in the last 15 years. A record says someone saw it there, not that you will.
Humpback whale Megaptera novaeangliaeWhale or dolphin
Seen in 3 records.
Harbor seal Phoca vitulinaSeal or sea lion
Seen in 27 records.
Shore crab Carcinus maenas
Seen in 39 records, mostly Apr to Sep.
Rock crab Cancer irroratus
Seen in 24 records, mostly May to Sep.
Common sand dollar Echinarachnius parma
Seen in 19 records, mostly Aug to Nov.
Asian shore crab Hemigrapsus sanguineus
Seen in 15 records, mostly Jun to Sep.
Jonah crab Cancer borealis
Seen in 14 records.
Long-armed hermit crab Pagurus longicarpus
Seen in 12 records, mostly Jun to Sep.
American lobster Homarus americanus
Seen in 11 records, mostly Apr to Aug.
Lady crab Ovalipes ocellatus
Seen in 11 records, mostly May to Sep.
Striped bass Morone saxatilis
Seen in 5 records.
Blood star Henricia sanguinolenta
Seen in 4 records.
Records: OBIS (Ocean Biodiversity Information System, IOC-UNESCO) and GBIF.org (1 November 2026, doi:10.15468/dl.jeesns), from the datasets named here, CC0 and CC BY records only. Names: WoRMS and GBIF; common names from the Catalogue of Life, the GBIF Backbone and Wikidata. Largest datasets here: iNaturalist Research-grade Observations; SERC Chesapeake Bay Rivers Array; Ocean Genome Legacy Collection; UNH - Coastal New England MBON - Atlantic cod; Happywhale - Humpback whale in North Atlantic Ocean. Credits
This week's visibility and the current no free forecast gives. Ask a dive centre before you book.
Saved: this link opens the same trip
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