| Shipwrecks |
- 1 May: Arlington, Dronning Maud, Uller
- 3 May: HMS Afridi, Bison
- 4 May: ORP Grom
- 5 May: Maianbar
- 8 May: Doris
- 10 May: Nordnorge, Goslar
- 11 May: Antilla
- 12 May: HMCS Gate Vessel 1
- 14 May: HNLMS Abraham van der Hulst, Batterijschip Ijmuiden, HNLMS Gerard Callenburgh, HNLMS Johan Maurits van Nassau, Jan Pieterszoon Coen, HNLMS O 8, HNLMS O 11, HNLMS O 12, HNLMS O 25, HNLMS O 26, HNLMS O 27, HNLMS Pieter Florisz
- 15 May: HMS Valentine
- 16 May: Chrobry
- 17 May: HNLMS Noordbrabant
- 18 May: HMS Effingham, Sirius
- 19 May: Belgica, HMS Whitley
- 21 May: L'Adroit
- 23 May: Jaguar, Orage
- 24 May: Chacal, HMS Wessex
- 25 May: ORP Orzeł
- 26 May: HMS Curlew
- 27 May: Cap Tafelneh
- 28 May: Abukir
- 29 May: HMS Grafton, HMS Grenade, Lorina, Mona's Queen, HMS Wakeful
- 30 May: Fenella, Bourrasque, HMS King Orry, Normannia
- 31 May: Siroco, U-13
- Unkmnow date: Munich
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