National Grid (NG.L) Seasonality
Recurring seasonal patterns for NG.L — the calendar windows where National Grid has historically tended to rise or fall, with the win rate (how often it repeated) and average return for each, based on the last 10 years of price history.
NG.L seasonality at a glance
Over the last 10 years, NG.L's strongest seasonal window has been Mar 1 – Mar 31: it ended higher in 9 of 10 years (90% win rate) with an average return of +3.32% across a 30-day hold. On the weak side, NG.L has historically declined between May 7 – Jun 6, falling in 10 of 10 years (average -5.26%).
In total, our analysis finds 449 recurring seasonal windows for National Grid — 282 bullish and 167 bearish. The next high-win-rate window, Oct 5 – Oct 25, opens in 24 days. These figures describe historical behaviour only — not a forecast.
NG.L's upcoming & recent seasonal patterns
Holding period:10-day20-day30-dayOrdered by season — windows opening soon first, plus a couple of recently completed high-performers. Holding-period colors help you compare durations at a glance.
| Status | Seasonal window | Hold | Avg return | Win rate | This year |
|---|---|---|---|---|---|
| Completedended 47d ago | Jul 16 – Jul 26 | 10d | +1.64% | 80% | +1.73% |
| Completedended 48d ago | Jul 15 – Jul 25 | 10d | +1.14% | 90% | +0.20% |
| Upcomingin 24d | Oct 5 – Oct 25 | 20d | +1.96% | 80% | — |
| Upcomingin 25d | Oct 6 – Oct 26 | 20d | +2.49% | 80% | — |
| Upcomingin 26d | Oct 7 – Oct 17 | 10d | +1.87% | 80% | — |
| Upcomingin 26d | Oct 7 – Oct 27 | 20d | +2.81% | 90% | — |
| Upcomingin 27d | Oct 8 – Oct 18 | 10d | +2.02% | 80% | — |
Win rate = how often the pattern repeated in the same direction. Average return = the mean move across all analysed years. Past performance does not guarantee future results.
Explore NG.L seasonality in full
See the seasonal curve chart, filter by win rate and return, and track upcoming windows — free during beta.
NG.L seasonality FAQ
What has historically been the best month to buy NG.L stock?
Based on the last 10 years of price data, NG.L's strongest seasonal window starts in March: Mar 1 to Mar 31, which ended higher in 9 of 10 years (90% win rate) with an average return of +3.32%. Past seasonal patterns do not guarantee future performance.
What is NG.L's strongest seasonal pattern?
NG.L's highest-win-rate pattern in our data is the Mar 1 – Mar 31 window (30-day hold): up in 9 of the last 10 years with an average move of +3.32%.
When has NG.L historically performed worst?
NG.L's weakest recurring window has been May 7 to Jun 6, declining in 10 of 10 years with an average return of -5.26%.
How reliable are NG.L's seasonal patterns?
Each NG.L pattern is scored by its historical win rate — the share of the last 10 years it repeated in the same direction. NG.L currently shows 449 recurring windows (282 bullish, 167 bearish). Seasonality describes historical tendencies only; it is not a prediction, and past performance does not guarantee future results.
What is NG.L stock seasonality?
Seasonality is the tendency of a stock to perform in a similar way during the same period each year. By analysing National Grid's price history across many years, SeasonalityX identifies recurring calendar windows — exact start and end dates — where NG.L has repeatedly risen (bullish) or fallen (bearish). Each pattern is scored by its win rate and average return so you can judge how reliable and how strong it has been.
Seasonality is one input among many — it works best alongside your own research and risk management. Learn more in our guide to seasonal analysis and the tutorials.