Cape Cod beaches have been temporarily closed for swimming dozens of times over the summer after sharks were spotted in the waters off shore.
Since the beginning of July, there have been at least 105 closures on the Cape and Islands, 88 of which occurred since Aug. 1. Some beaches have been closed twice in one day.
On Aug. 12, two beaches were also closed in Plymouth, on the South Shore. They were closed again on Aug. 17 and Aug. 23.
The closures come as concerns have been rising over the presence of great white sharks in waters off the coast, where hundreds are gathering to feast on an abundant seal population. Last year, Arthur Medici, a 26-year-old who was boogie boarding, was bitten by a shark off Wellfleet and died from his injuries. He was the first person killed in Massachusetts by a shark since 1936.
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The Division of Marine Fisheries is advising that beachgoers in areas where there have been documented shark sightings should stay in shallow water at all times, be aware of their surroundings when in the water, and adhere to posted warnings
Here’s a running list of which beaches have seen temporary closures and what days they happened:
■Ballston Beach, Truro
8/11, 8/12, 8/13, 8/18
■Cahoon Hollow Beach, Wellfleet
8/31
■Cisco Beach, Nantucket
Twice on 8/3, 8/18
■Coast Guard Beach, Truro
7/13, 7/25, 8/5, 8/7, 8/12, 8/16
■Coast Guard Beach, Eastham
8/11, 8/13
■Duxbury Beach, Duxbury
9/1
■Head of the Meadow Beach, Truro
Twice on 7/13, 7/16, 7/24, 7/25, twice on 8/5, 8/7, twice on 8/12, 8/16, 8/17, 8/18, twice on 8/19, 8/21, twice on 8/22, 8/31, twice on 9/1
■Longnook Beach, Truro
7/14, twice on 8/1, 8/3
■Madaket Beach, Nantucket
8/18
■Marconi Beach, Wellfleet
7/2, 7/28, 8/3, 8/4, 8/9, 8/12, 8/15, 8/18, 8/19, 8/23, 8/27, twice on 8/28, 8/30
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■Nauset Beach, Orleans
7/21, 7/26, twice on 8/3, twice on 8/7, 8/8, twice on 8/9, 8/11, 8/13, 8/14, 8/15, 8/16, 8/17, 8/23, 8/31, 9/1, 9/2
■Nauset Light Beach, Eastham
8/12, 8/16, 8/19, 8/29
■Newcomb Hollow Beach, Wellfleet
7/30, twice on 7/31, 8/6, 8/8, 8/13, 8/14, twice on 8/15, twice on 8/16, 8/18, 8/19, 8/20, 8/21, 8/23, 9/14, 9/15
■Nobadeer Beach, Nantucket
8/18
■Long Beach, Plymouth
8/12, 8/17, 8/23
■Race Point Beach, Provincetown
7/21, 8/5, 8/31
■South Beach, Edgartown, Martha’s Vineyard
7/30
■Surfside Beach, Nantucket
8/18
■White Crest Beach, Wellfleet
9/1
■White Horse Beach, Plymouth
8/12, 8/17, 8/23
Jaclyn Reiss and Zoe Greenberg of the Globe staff contributed to this report. Maria Lovato can be reached at maria.lovato@globe.com. Follow her on Twitter @maria_lovato99.