| Navy | The Royal Navy |
| Type | Submarine |
| Class | S |
| Pennant | N 47 |
| Built by | Scotts Shipbuilding & Engineering Co. (Greenock, Scotland) |
| Ordered | 15 Mar 1934 |
| Laid down | 25 May 1934 |
| Launched | 28 Nov 1935 |
| Commissioned | 12 Mar 1936 |
| End service | 23 Jun 1945 |
| Loss position | |
| History | Decommissioned at Halifax, Nova Scotia, Canada on 23 June 1945. HMS Seawolf is not listed as active unit in the July 1945 Navy list Sold to be broken up for scrap in November 1945. Scrapped at Montreal, Canada. |
Commands listed for HMS Seawolf (N 47)
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| Commander | From | To | |
| 1 | Lt.Cdr. John Wyndham Studholme, RN | 7 Feb 1939 | 17 Aug 1940 |
| 2 | Lt. Patrick Lainson Field, RN | 17 Aug 1940 | 9 Oct 1941 |
| 3 | Lt. Richard Prendergast Raikes, RN | 9 Oct 1941 | Aug 1942 |
| 4 | Lt. Frederick Danford Gordon Challis, DSC, RN | Aug 1942 | Aug 1943 |
| 5 | Lt. Denis Woolnough Mills, DSC, RN | Aug 1943 | 23 Aug 1944 |
| 6 | Lt. Bruce Collins, RN | 23 Aug 1944 | 23 Jun 1945 |
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Noteable events involving Seawolf include:
6 Oct 1939
HMS Seawolf (Lt.Cdr. J.W. Studholme, RN) fires two torpedoes against the German light cruiser Nürnberg and the torpedo boat Falke in the Skagerrak about 35 nautical miles west of Skagen, Denmark in position 57º39'N 09º28'E. None of the targets was hit.
(see map)
18 Apr 1940
HMS Seawolf (Lt.Cdr. J.W. Studholme, RN) torpedoes and sinks the German merchant Hamm (5874 GRT) in the Skagerrak in position 58º09'N, 10º32'E. (see map)
22 Nov 1941
HMS Seawolf (Lt. R.P. Raikes, RN) claims to have sunk the Norwegian merchant Bessheim (1774 GRT) off the Syltefjord. This can however not be the case as Bessheim was mined and sunk the previous day off Hammerfest. HMS Seawolf probably attacked another merchant.
6 Mar 1942
HMS Seawolf (Lt. R.P. Raikes, RN) sighted the German battleship Tirpitz along with her escorting destroyers Paul Jacobi, Friedrich Ihn, Hermann Schoemann and Z-25. The German ships had sailed from Trondheim, Norway with the intention to attack convoy PQ-12. (see map)
29 Jan 1943
HMS Seawolf (Lt. F.D.G. Challis, DSC, RN) arrives at Halifax, Nova Scotia, Canada to aid in A/S training.